Wintery Knight

…integrating Christian faith and knowledge in the public square

Define biomimetics and give two examples from peer-reviewed science journals?

I'm baby octopus, and I approve this message

I’m baby octopus, and I approve this message

Today, I have two examples of biomimetics.

But first, here’s what that is:

Biomimetic refers to human-made processes, substances, devices, or systems that imitate nature. The art and science of designing and building biomimetic apparatus is called biomimetics, and is of special interest to researchers in nanotechnology, robotics, artificial intelligence (AI), the medical industry, and the military.

Here’s the first example from Science Daily.

A robotic arm that can bend, stretch and squeeze through cluttered environments has been created by a group of researchers from Italy.

Inspired by the eight arms of the octopus, the device has been specifically designed for surgical operations to enable surgeons to easily access remote, confined regions of the body and, once there, manipulate soft organs without damaging them.

It is believed the device could reduce the number of instruments, and thus entry incisions, necessary in surgical operations, with part of the arm being used to manipulate organs whilst another part of the arm operates.

The device, which has been presented 14 May, in IOP Publishing’s journal Bioinspiration and Biomimetics, holds a key advantage over traditional surgical tools due to its ability to quickly transform from a bending, flexible instrument into a stiff and rigid instrument.

It has been inspired by the eight highly flexible arms of the octopus which have no rigid skeletal support and can thus easily adapt to the surrounding environment by twisting, changing their length or bending in any direction at any point along the arm.

The octopus can, however, vary the stiffness of its arms, temporarily transforming the flexible limbs into stiffened segments to allow the octopus to move and interact with objects.

[…]The ability of the robotic arm to manipulate organs while surgical tasks are performed was successfully demonstrated in simulated scenarios where organs were represented by water-filled balloons.

‘Traditional surgical tasks often require the use of multiple specialized instruments such as graspers, retractors, vision systems and dissectors, to carry out a single procedure,’ Dr Ranzani continued.

‘We believe our device is the first step to creating an instrument that is able to perform all of these tasks, as well as reach remote areas of the body and safely support organs around the target site.’

Fascinating, and useful. If we are reverse engineering these designs, should we assume that they were designed in the first place? Especially when there is zero evidence for macroevolution either in the lab or in the fossil record.

The shorebird's beak is more interesting than you might think

The shorebird’s beak is more interesting than you might think

My second example of biomimetics is also from Science Daily.

Excerpt:

A UT Arlington engineering professor and his doctoral student have designed a device based on a shorebird’s beak that can accumulate water collected from fog and dew.

The device could provide water in drought-stricken areas of the world or deserts around the globe.

Xin Heng… a doctoral student in Mechanical and Aerospace Engineering, and Cheng Luo, MAE professor, have made a device that can use fog and dew to collect water.

Cheng Luo, professor in the Mechanical & Aerospace Engineering Department, and Xin Heng, PhD candidate in the same College of Engineering department, published “Bioinspired Plate-Based Fog Collectors” in the Aug. 25 edition of ACS’ (American Chemical Society) Applied Materials & Interfaces journal.

The idea began when Heng saw an article that explained the physical mechanism shorebirds use to collect their food — driving food sources into their throats by opening and closing their beaks. Luo said that inspired the team to try to replicate the natural beak in the lab.

“We wanted to see if we could do that first,” Luo said. “When we made the artificial beaks, we saw that multiple water drops were transported by narrow, beak-like glass plates. That made us think of whether we could harvest the water from fog and dew.”

Their experiments were successful. They found out they could harvest about four tablespoons of water in a couple of hours from glass plates that were about 26 centimeters long by 10 centimeters wide.

Now, if we are lifting designs out of nature, then shouldn’t we give honor to God for putting the designs in there in the first place? I really think it’s important to give God credit where due for his clever designs, even if you’re not a big fan of the shorebird. I also think it’s interesting that it’s engineers who made this application of something in nature, not biologists.  Also, I feel I have to mention that the birdy is also cute, which is not insignificant, if you like birds as much as I do. I blog about birds a lot on this blog. And dragonflies too! Because wings are awesome!

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New study: tiny songbirds fly over the Atlantic ocean and back each year

Blackpoll Warbler- so tiny and so cute!

Blackpoll Warbler- so cute!

I love birds! I really, really do! A lot!

So here is the latest study, reported in Science Daily about our amazing feathered friends.

They write:

For more than 50 years, scientists had tantalizing clues suggesting that a tiny, boreal forest songbird known as the blackpoll warbler departs each fall from New England and eastern Canada to migrate nonstop in a direct line over the Atlantic Ocean toward South America, but proof was hard to come by.

Now, for the first time an international team of biologists report “irrefutable evidence” that the birds complete a nonstop flight ranging from about 1,410 to 1,721 miles (2,270 to 2,770 km) in just two to three days, making landfall somewhere in Puerto Rico, Cuba and the islands known as the Greater Antilles, from there going on to northern Venezuela and Columbia. Details of their study, which used light-level, or solar, geolocators, appear in the current issue of Biology Letters.

First author Bill DeLuca, an environmental conservation research fellow at the University of Massachusetts Amherst, with colleagues at the University of Guelph, Ontario, the Vermont Center for Ecostudies and other institutions, says, “For small songbirds, we are only just now beginning to understand the migratory routes that connect temperate breeding grounds to tropical wintering areas. We’re really excited to report that this is one of the longest nonstop overwater flights ever recorded for a songbird, and finally confirms what has long been believed to be one of the most extraordinary migratory feats on the planet.”

While other birds, such as albatrosses, sandpipers and gulls are known for trans-oceanic flights, the blackpoll warbler is a forest dweller that migrates boldly where few of its relatives dare to travel. Most migratory songbirds that winter in South America take a less risky, continental route south through Mexico and Central America, the authors note. A water landing would be fatal to a warbler.

[…]For this work the scientists fitted geolocator packs on 20 birds in Vermont and 20 more in Nova Scotia. They were able to recapture three birds from the Vermont group and two from the Nova Scotia group for analyses.

So-called light-level geolocators use solar geolocation, a method used for centuries by mariners and explorers. It is based on the fact that day length varies with latitude while time of solar noon varies with longitude. So all the instrument needs to do is record the date and length of daylight, from which daily locations can then be inferred once the geolocator is recaptured. “When we accessed the locators, we saw the blackpolls’ journey was indeed directly over the Atlantic. The distances travelled ranged from 2,270 to 2,770 kilometers,” DeLuca says.

Evolution News has more on the discovery.

They write:

More record-breaking discoveries may be in store. Oskin says that some of the blackpoll warblers spend their summers in Alaska and Canada instead of New England. If they fly east before joining the southern route to Colombia and Venezuela, it would add three thousand more miles to their annual migration.

[…]But that’s not all. Lest we forget, there are the Monarch butterflies, much smaller and lighter than birds, that travel three thousand miles from Canada to Mexico each year, as detailed in Illustra’s film Metamorphosis. Even though butterflies don’t fly non-stop, that’s — well, we need an adjective beyond “extraordinary.” And more recently, British scientists found that another butterfly, the painted lady, flies triple that distance — nine thousand miles — in its annual migration from the UK to Africa.

Think of all the integrated systems that have to be in place to make these migrations possible. The birds or butterflies need elegant flight systems, with all the attendant muscles, nerves, and structural supports required. They require digestive systems to sustain them, circulatory systems, thermal systems, sensory systems, and protection from the elements. Most astonishing are the navigational systems, including sensing the stars or the earth’s magnetic field, to take them unerringly to their destination and back over routes of thousands of miles. To pack all that in a tiny animal is a masterpiece of miniaturization. Oh — and then there’s a reproductive system, and a battery of instincts to operate all the systems.

It seems fair to say these engineering marvels are beyond the reach of unguided Darwinian evolution. The birds don’t have to fly that far. Warblers could stay inland along the coast, and feed on the way, or learn to get by through the winter like other birds do. Butterflies, too, could stay with other species that don’t migrate. Natural selection would take the easy road, get rid of the wings, and let them grovel in the dirt to eke out a living. These migratory abilities are gratuitous and superfluous to the requirements of mere survival. Such over-design, right on the “brink of impossibility,” speaks of design so beyond our comprehension, we can only stand in awe.

Butterflies are OK, but birds are much better – you can actually make friends with birds. Anyway, if you like birds as much as I do… well, no one likes them as much as I do… but if you like birds a lot, then you should get Illustra’s documentary Flight: The Genius of Birds and watch it. And share it with your friends.

Filed under: News, , , , , , ,

The importance of having a narrative when confronting the assumption of naturalism

How do you present theism as a rational belief to a person who thinks that the progress of science has removed the need for God?

Canadian science writer Denyse O’Leary writes about the history of cosmology at Evolution News.

Excerpt:

What help has materialism been in understanding the universe’s beginnings?

Many in cosmology have never made any secret of their dislike of the Big Bang, the generally accepted start to our universe first suggested by Belgian priest Georges Lemaître (1894-1966).

On the face of it, that is odd. The theory accounts well enough for the evidence. Nothing ever completely accounts for all the evidence, of course, because evidence is always changing a bit. But the Big Bang has enabled accurate prediction.

In which case, its hostile reception might surprise you. British astronomer Fred Hoyle (1915-2001) gave the theory its name in one of his papers — as a joke. Another noted astronomer, Arthur Eddington (1882-1944), exclaimed in 1933, “I feel almost an indignation that anyone should believe in it — except myself.” Why? Because “The beginning seems to present insuperable difficulties unless we agree to look on it as frankly supernatural.”

One team of astrophysicists (1973) opined that it “involves a certain metaphysical aspect which may be either appealing or revolting.” Robert Jastrow (1925-2008), head of NASA’s Goddard Institute for Space Studies, initially remarked, “On both scientific and philosophical grounds, the concept of an eternal Universe seems more acceptable than the concept of a transient Universe that springs into being suddenly, and then fades slowly into darkness.” And Templeton Prize winner (2011) Martin Rees recalls his mentor Dennis Sciama’s dogged commitment to an eternal universe, no-Big Bang model:

For him, as for its inventors, it had a deep philosophical appeal — the universe existed, from everlasting to everlasting, in a uniquely self-consistent state. When conflicting evidence emerged, Sciama therefore sought a loophole (even an unlikely seeming one) rather as a defense lawyer clutches at any argument to rebut the prosecution case.

Evidence forced theorists to abandon their preferred eternal-universe model. From the mid 1940s, Hoyle attempted to disprove the theory he named. Until 1964, when his preferred theory, the Steady State, lost an evidence test.

Here is a quick summary of some of the experimental evidence that emerged in the last few decades that caused naturalists to abandon the eternal universe that they loved so much when they were younger.

The importance of having a narrative

Now I want to make a very, very important point about Christianity and the progress of science. And that point is that it is very important that Christians present the evidence in exactly the way that Denyse presented it in that article – in its historical context, featuring the conflict between naturalists and the experimental evidence.

All Christians should be familiar with the following basic pieces of evidence which fit the war between science and naturalism narrative:

  1. The origin of the universe
  2. The cosmic fine-tuning
  3. The origin of life (biological information)
  4. The sudden origin of the Cambrian phyla
  5. The habitability/observability correlation

When you talk about these evidences as a Christian theist to non-Christians, you have to have cultivated a genuine interest in reconciling your beliefs with science. You have to accept that there are two books that reveal God’s character and attributes. The book of nature, and the book of Scripture. And you need to be flexible about getting these two books to fit together. The book of nature gives us natural theology (see Romans 1). It tells us that God is Creator and Designer. The book of Scripture tells us that God stepped into history as a man to save us by taking the punishment for our headlong rush away from God, which the Bible calls sin. Science is one way that humans can recover some of basic knowledge about God. Knowledge that is only possible because God created and designed the universe (and us) in such a way that we are capable of making discoveries, and that the universe is capable of being explored and understood.

It’s very important to present these five basic evidences to non-Christians in the historical context. And here is the story you must tell: “In the beginning, there was the naturalism, and the naturalism tried to argue from ignorance that God was not Creator and God was not Designer. And then came the science, and now people have to give up their naturalism in order to not be crazy and irrational”. That’s the narrative you use when talking to non-Christians about science.

In the beginning was the naturalism:

  1. In pre-scientific times, atheists maintained that the universe was eternal
  2. In pre-scientific times, atheists maintained that a life-permitting universe was as likely as a life-prohibiting universe
  3. In pre-scientific times, atheists maintained that the cell was a simple blob of jello that could spontaneously emerge in some warm pond
  4. In pre-scientific times, atheists maintained that the sudden origin of the Cambrian phyla would be explained by subsequent fossil discoveries
  5. In pre-scientific times, atheists maintained that there was nothing special about our galaxy, solar system, planet or moon

But then science progressed by doing experiments and making observations:

  1. Scientists discovered redshift and the cosmic microwave background radiation (evidence for a cosmic beginning) and more!
  2. Scientists discovered the fine-tuning of gravity and of the cosmological constant and more!
  3. Scientists discovered protein sequencing and exposed the myth of “junk DNA” and more!
  4. Scientists discovered an even shorter Cambrian explosion period and the absence of precursor fossils and more!
  5. Scientists discovered galactic habitable zones and circumstellar habitable zones and more!

And now rational people – people who want to have true beliefs about reality – need to abandon a false religion (naturalism).

Now naturally, science is in a state of flux and things change. But you have to look at the trend of discoveries, and those trends are clearly going against naturalism, and in favor of Christian theism. No one is arguing for a deductive proof here, we are simply looking at the evidence we have today and proportioning our belief to the concrete evidence we have today. People who are guided by reason should not seek to construct a worldview by leveraging speculations about future discoveries and mere possibilities. We should instead believe what is more probable than not. That’s what a rational seeker of truth ought to do. Proportion belief to probabilities based on current, concrete knowledge.

It is very important that Christians keep abreast of the progress of science, and give proper respect to science when forming our worldviews, and keep in mind what is really going on with atheism. There is a lot of loud worshiping of science by people like Dawkins and Atkins and Krauss, but if you dig into things a little, you’ll find that they are actually filled with rage and enmity against what science has revealed about nature. And not just in one area, but in many, many areas.

Atheism, as a worldview, is not rooted in an honest assessment about what science tells us about reality. Atheism is rooted in a religion: naturalism. And the troubling thing we learn from looking at the history of science is that this religion of naturalism is insulated from correction from the progress of science. Nothing that science reveals about nature seems to be able to put a dent in the religion of naturalism, at least for most atheists. Their belief in naturalism is so strong that it repels all scientific evidence that falsifies it. Atheists simply don’t let science inform and correct their worldview.

It falls to us Christian theists, then, to hold them accountable for their abuse and misrepresentation of science. And that means telling the story of the progress of science accurately, and accurately calling out the religion of naturalism for what it is – a religion rooted in blind faith and ignorance that has been repeatedly and convincingly falsified by the progress of science in the modern era.

Positive arguments for Christian theism

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Shorebird’s beak inspires researchers to design new water collection strategy

The shorebird's beak is more interesting than you might think

The shorebird’s beak is more interesting than you might think

Dr. Fazale Rana of Reasons to Believe tweeted this cool example of biomimetics from Science Daily.

Excerpt:

A UT Arlington engineering professor and his doctoral student have designed a device based on a shorebird’s beak that can accumulate water collected from fog and dew.

The device could provide water in drought-stricken areas of the world or deserts around the globe.

Xin Heng… a doctoral student in Mechanical and Aerospace Engineering, and Cheng Luo, MAE professor, have made a device that can use fog and dew to collect water.

Cheng Luo, professor in the Mechanical & Aerospace Engineering Department, and Xin Heng, PhD candidate in the same College of Engineering department, published “Bioinspired Plate-Based Fog Collectors” in the Aug. 25 edition of ACS’ (American Chemical Society) Applied Materials & Interfaces journal.

The idea began when Heng saw an article that explained the physical mechanism shorebirds use to collect their food — driving food sources into their throats by opening and closing their beaks. Luo said that inspired the team to try to replicate the natural beak in the lab.

“We wanted to see if we could do that first,” Luo said. “When we made the artificial beaks, we saw that multiple water drops were transported by narrow, beak-like glass plates. That made us think of whether we could harvest the water from fog and dew.”

Their experiments were successful. They found out they could harvest about four tablespoons of water in a couple of hours from glass plates that were about 26 centimeters long by 10 centimeters wide.

Now, if we are lifting designs out of nature, then shouldn’t we give honor to God for putting the designs in there in the first place? I really think it’s important to give God credit where due for his clever designs, even if you’re not a big fan of the shorebird. I also think it’s interesting that it’s engineers who made this application of something in nature, not biologists.  Also, I feel I have to mention that the birdy is also cute, which is not insignificant, if you like birds as much as I do.

Filed under: News, , , , , , ,

What is pre-suppositionalism? What is presuppositional apologetics?

The Messianic Drew has a post up where he explains seven reasons, and I’ll add a still more important reason below.

His introduction:

While most Christians will agree that there is a need to defend the faith, many will not realize that there is a debate regarding methodologies. This paper will address the various apologetics methods, and then analyze before critiquing the relatively new method of presuppositionalism. While this method has a lot to offer from a practical apologetics standpoint, it cannot be held rationally as a worldview. This paper will give seven reasons why this is the case.

Before addressing presuppositionalism, an introduction to other apologetic methodologies is in order. The main form of apologetics used historically is called Classical Apologetics. Under this method, the apologist gives arguments for the existence of God, and then proceeds to develop Christian evidences for the Christian worldview. Arguments like the moral argument, and other reason-based argumentation tend to dominate this method.

If classical apologetics is a two-step method, evidentialism is a one-step method. The evidentialist will usually forego rationalistic argumentation and will simply bring out evidences for the Christian worldview. The method of Gary Habermas is an example of evidentialism.

Those methods as well as presuppositionalism are the main methods of apologetics. There are others as well, such as fideism, which tells people to just believe without argument. Polemical apologetics seeks to attack other worldviews. There are cumulative case methods of apologetics, where two worldviews face off for which one better answers life’s deepest questions. There is also eclectic apologetics, which seeks to borrow methods from other schools of apologetics depending on the need.

This brings the discussion to presuppositionalism, which seeks to examine the underlying assumptions of any worldview. In short, presuppositionalism states that one’s foundational views are the only truly relevant factor in discussing worldviews. The founder of modern presuppositionalism is Cornelius van Til.

Here are his 7 points:

  1. Presuppositionalism is circular reasoning
  2. Presuppositionalism minimizes common grace
  3. Presuppositionalism confuses ontological priority with epistemic priority
  4. Presuppositionalism presupposes a highly controversial theory of knowledge
  5. Presuppositionalism often forgets that Christianity is, at least in principle, falsifiable
  6. Van Til’s apologetic might not even be Christian, but may be merely theistic
  7. Presuppositionalism faces the problem of incommensurability

And here is #6 in detail:

John Johnson gives a devastating critique as to why Van Til’s system is wholly inadequate when addressing other faiths, such as Islam. Van Til argues from Romans 1:18-21 that non-Christians suppress the truth, and that a presuppositional technique is necessary. However, this section of the Bible deals with knowledge of God, but not theological issues about the Trinity, Jesus, salvation by grace through faith alone, etc. [12] Instead, it only says that unbelievers are without excuse for denying monotheism. Paul reinforces this in Acts 17, when he talks about the statue to an unknown God. Paul deals with the Athenians on their own ground.

A more practical example is what I call Artscroll Judaism. This is a fundamentalist sect of Orthodox Judaism, with its own think tanks which can give you an answer to anything. Anyone who is willing to take the leap into the system will find it every bit as coherent as one would find the Reformed Christian view.

John Warwick Montgomery gives a fable about a conversation between two presuppositionalists from two different religions: the Shadok religion, and the Gibi religion.

Shadok: You will never discover the truth, for instead of subordinating yourself to revelational truth (The Shadok Bible) you sinfully insist on maintaining the autonomy of your fallen intellect.

Gibi: Quite the contrary. [He repeats the same assertion substituting the Gibi Bible for the Shadok Bible.] And I say this not on the basis of my sinful ego but because I have been elected by the Gibi God.

Shadok: Wrong again! [He repeats the exact same claim, substituting Shadok Election for Gibi Election.] Moreover, the sovereign election of which I am the unworthy recipient has been the very work of God the Shadok Holy Spirit. And all of this is clearly taught in the self-validating Scripture of our people, which, I should not have to reiterate, derives from the true God and not from sinful, alledgedly autonomous man.

Gibi: How dare you invert everything. [He laboriously repeats the preceding argument, substituting Gibi election, the Gibi Holy Spirit, and the Gibi Bible.]

Shadok: Absurd! This is the inevitable result of your colored glasses.

Gibi: It is you who have the glasses cemented to your face. Mine have been transparent through sovereign grace and Gibi election, as proclaimed by the Gibi God’s word.

Shadok: Your religion is but the inevitable byproduct of sin—a tragic effort at self-justification through idolatry. Let’s see what the Shadok God really says about his word.

Gibi: I will not listen to your alleged “facts.” Unless you start with the truth, you have no business interpreting facts at all. Let me help you by interpreting facts revelationally.

Shadok: Of course you will not listen to the proper interpretation of facts. Blinded by your sin, you catch each fact as you would a ball—and then you throw it into a bottomless pit.

Gibi: That’s what you do with what I say—a clear proof of your hopeless, pseudo-autonomous condition. May the Gibi God help you.

Shadok: May the Shadok God help you![13]

As Montgomery notes, this encounter is hopeless, since neither side can appeal to neutral facts to solve the dispute. Both sides are reduced to chest-thumping, loud assertion, and empty fideism.

It’s funny but it’s true! This is presuppositionalism in action. It’s arguing without appealing to any facts.

And here is my eighth point from my post on presuppositionalism.

Excerpt:

My view of presuppositional apologetics is that is as a system, it is circular reasoning. It assumes Christianity in order to prove Christianity. But there is an even worse problem with it. It’s not a Biblical way of doing apologetics. It’s man’s way of doing apologetics, not God’s. I think that the best way to understand Van Til’s apologetics is by saying that it really just a sermon disguised as apologetics. The problem is that Van Til’s sermon has no basis in the Bible. Wherever he is getting his view from, it’s not from the Bible. When I look the Bible, I don’t see any Biblical support for the view that pre-suppositional apologetics is the only approved way of defending the faith. Instead, the standard method seems to be evidentialism.

In Romans 1, Paul writes that people can learn about God’s existence from the natural world.

Romans 1:18-23:

18The wrath of God is being revealed from heaven against all the godlessness and wickedness of men who suppress the truth by their wickedness,

19since what may be known about God is plain to them, because God has made it plain to them.

20For since the creation of the world God’s invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that men are without excuse.

21For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened.

22Although they claimed to be wise, they became fools

23and exchanged the glory of the immortal God for images made to look like mortal man and birds and animals and reptiles.

And in Acts, Peter appeals to eyewitness testimony for the resurrection, and Jesus’ miracles.

Acts 2:22-24, and 36:

22“Men of Israel, listen to this: Jesus of Nazareth was a man accredited by God to you by miracles, wonders and signs, which God did among you through him, as you yourselves know.

23This man was handed over to you by God’s set purpose and foreknowledge; and you, with the help of wicked men, put him to death by nailing him to the cross.

24But God raised him from the dead, freeing him from the agony of death, because it was impossible for death to keep its hold on him.

And finally from the same chapter:

36“Therefore let all Israel be assured of this: God has made this Jesus, whom you crucified, both Lord and Christ.”

Professor Clay Jones of Biola University makes the case that the use of evidence when preaching the gospel was standard operating procedure in the early church. (H/T Apologetics 315)

Intro:

In 1993 I started working for Simon Greenleaf University (now Trinity Law School) which offered an M.A. in Christian apologetics (Craig Hazen was the director). Much of my job was to promote the school and although I had studied Christian apologetics since my sophomore year in high school, I decided I needed to see whether an apologetic witness had strong Biblical precedence.

It does.

As I poured through the Scripture I found that Jesus and the apostles preached the resurrection of Christ as the sign of the truth of Christianity.

What follows are some of the passages which support the resurrection witness.

Here is my favorite verse from his massive list list of verses in favor of the evidential approach to Christian apologetics:

Mat. 12:39-40: A wicked and adulterous generation asks for a miraculous sign! But none will be given it except the sign of the prophet Jonah. For as Jonah was three days and three nights in the belly of a huge fish, so the Son of Man will be three days and three nights in the heart of the earth.

Jesus is saying that the resurrection was deliberately given as a sign to unbelievers to convince them. (“The Sign of Jonah” = the resurrection)

So, I see that God uses nature and miracles to persuade, which can be assessed using scientific and historical methods. Can anyone find me a clear statement in the Bible that states that only pre-suppositional arguments should be used? I could be wrong, and I am willing to be proven wrong. I think we should use the Biblical method of apologetics, not the fallen man’s method of apologetics.

Presuppositional arguments, like the ontological argument from reason or the epistemological argument from reason are good. Presuppositionalism as a system is not good. It’s good to learn presuppositional arguments, but as part of a quiver of arguments – not in isolation.

By the way, Eric Chabot posted a fascinating discussion between presuppositionalist James White and Richard Howe on this topic, where the point about how presupositionalism cannot prove Christianity in particular came up.

Presuppositionalism is not a Christian methodology. It’s neither Biblical, nor can it be used to prove Christianity. It’s man’s system of apologetics, not God’s.

UPDATE: David Haines posted a couple of criticisms of presuppositionalism here.

UPDATE: A rebuttal to the first of Messianic Drew’s points is here.

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