Tag Archives: Logic

Podcasts

Six reasons why you should believe in non-physical minds

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(Podcast uploaded, with permission, by ReligioPolitical Talk)

This podcast is a must-listen. Please take the time to download this podcast and listen to it. I guarantee that you will love this podcast. I even recommended it to my Dad and I almost never do that.

Details:

In this podcast, J. Warner examines the evidence for the existence of the mind (and inferentially, the soul) as he looks at six classic philosophical arguments. Jim also briefly discusses Thomas Nagel’s book, Mind and Cosmos and discusses the limitations of physicalism.

The MP3 file is here. (67 MB, 72 minutes)

Topics:

  • Atheist Thomas Nagel’s latest book “Mind and Cosmos” makes the case that materialism cannot account for the evidence of mental phenomena
  • Nagel writes in this recent New York Times article that materialism cannot account for the reality of consciousness, meaning, intention and purpose
  • Quote from the Nagel article:

Even though the theistic outlook, in some versions, is consistent with the available scientific evidence, I don’t believe it, and am drawn instead to a naturalistic, though non-materialist, alternative. Mind, I suspect, is not an inexplicable accident or a divine and anomalous gift but a basic aspect of nature that we will not understand until we transcend the built-in limits of contemporary scientific orthodoxy.

  • When looking at this question, it’s important to not have our conclusions pre-determined by presupposing materialism or atheism
  • If your mind/soul doesn’t exist and you are a purely physical being then that is a defeater for Christianity, so we need to respond
  • Traditionally, Christians have been committed to a view of human nature called “dualism” – human beings are souls who have bodies
  • The best way* to argue for the existence of the soul is using philosophical arguments

The case:

  • The law of identity says that if A = B’ if A and B have the exact same properties
  • If A = the mind and B = the brain, then is A identical to B?
  • Wallace will present 6 arguments to show that A is not identical to B because they have different properties

Not everyone of the arguments below might make sense to you, but you will probably find one or two that strike you as correct. Some of the points are more illustrative than persuasive, like #2. However, I do find #3, #5 and #6 persuasive.

1) First-person access to mental properties

  • Thought experiment: Imagine your dream car, and picture it clearly in your mind
  • If we invited an artist to come and sketch out your dream car, then we could see your dream car’s shape on paper
  • This concept of your dream car is not something that people can see by looking at your brain structure
  • Physical properties can be physically accessed, but the properties of your dream care and privately accessed

2) Our experience of consciousness implies that we are not our bodies

  • Common sense notion of personhood is that we own our bodies, but we are not our bodies

3) Persistent self-identity through time

  • Thought experiment: replacing a new car with an old car one piece at a time
  • When you change even the smallest part of a physical object, it changes the identity of that object
  • Similarly, your body is undergoing changes constantly over time
  • Every cell in your body is different from the body you had 10 years ago
  • Even your brain cells undergo changes (see this from New Scientist – WK)
  • If you are the same person you were 10 years ago, then you are not your physical body

4) Mental properties cannot be measured like physical objects

  • Physical objects can be measured (e.g. – use physical measurements to measure weight, size, etc.)
  • Mental properties cannot be measured

5) Intentionality or About-ness

  • Mental entities can refer to realities that are physical, something outside of themselves
  • A tree is not about anything, it just is a physical object
  • But you can have thoughts about the tree out there in the garden that needs water

6) Free will and personal responsibility

  • If humans are purely physical, then all our actions are determined by sensory inputs and genetic programming
  • Biological determinism is not compatible with free will, and free will is required for personal responsibility
  • Our experience of moral choices and moral responsibility requires free will, and free will requires minds/souls

He spends the last 10 minutes of the podcast responding to naturalistic objections to the mind/soul hypothesis.

*Now in the podcast, Wallace does say that scientific evidence is not the best kind of evidence to use when discussing this issue of body/soul and mind/brain. But I did blog yesterday about two pieces of evidence that I think are relevant to this discussion: corroborated near-death experiences and mental effort.

You might remember that Dr. Craig brought up the issue of substance dualism, and the argument from intentionality (“aboutness”), in his debate with the naturalist philosopher Alex Rosenberg, so this argument about dualism is battle-ready. You can add it to your list of arguments for Christian theism along with all the other arguments like the Big Bang, the fine-tuning, the origin of life, stellar habitability, galactic habitability, irreducible complexity, molecular machines, the Cambrian explosion, the moral argument, the resurrection, biological convergence, and so on.

News

J. Warner Wallace: why are you a Christian?

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J. Warner Wallace ask this question of a bunch of young people he trained, and he posted some of the responses.

Excerpt:

Last week I had the opportunity to train a group of high school students in preparation for an upcoming Berkeley Missions trip. These students will spend the next eight weeks learning about the evidence supporting the Christian worldview and examining many of the most popular objections to Christianity. Since we were very early in the process, I began by asking the students to tell me why they were Christians in the first place.

…[W]hen I asked the students to tell me why they were Christians, I didn’t get a single evidential response. Most had difficulty answering the question at all, and those who did sounded like members of the Mormon Church.

I didn’t know a lot of Christians growing up; I was surrounded by atheists and Mormon family members. I have six fantastic half-brothers and sisters who were raised in the LDS (Latter Day Saints) Church. Many are still committed to Mormonism and happy to share their faith. But if you ask them why they are believers, you’ll get many of the same answers I received with the high school students in the Berkeley training. “I prayed about it and God confirmed it was true,” “I have a relationship with God and I feel His presence,” “I had a strong experience that changed my life,” “I just know it is true,” “I was raised in the Church and I’ve never had a reason to question it; God has always been a part of my life,” “I know it’s true because my life is very different now.” These are all great responses and I want to be careful not to minimize the importance or validity of experiential evidence. But when I heard these kinds of answers offered as justification by the Christian students in our group, I asked them: “Do you believe Mormonism is true?” Many of these students had already been on the Utah Missions trip, so they understood the dramatic difference between the claims of Mormonism and the claims of Christianity. They all confirmed they did not believe Mormonism was true and immediately recognized the problem with their responses.

Since he mentioned Mormonism, I’ll just link to my post on Mormonism that offers 3 reasons to think that Mormonism is false. The first reason is scientific, the second is historical, and the third is philosophical.

But Wallace’s post made me think that it was a good for me to explain that it is OK for people to critically evaluate a worldview – any worldview – by using evidence. It’s important because a lot of Christians who believe that religion is about believing sincerely in things without evidence are going to have a hard time knowing why apparently moral, definitely sincere people in other religions are going to Hell, apparently just for the small crime of getting a few questions wrong on a theology quiz. The real answer to the question “Why am I a Christian?” is “because of the evidence”. And the real answer to the question “Why I am not some other religion?” is “because of the evidence”. Let’s take a look.

Here are a couple of worldviews that can be easily falsified with evidence.

Falsifying a religion using science

Consider this argument:

  1. Hindu cosmology teaches that the universe cycles between creation and destruction, through infinite time.
  2. The closest cosmological model conforming to Hindu Scriptures is the eternally “oscillating” model of the universe.
  3. The “oscillating” model requires that the universe exist eternally into the past.
  4. But the evidence today shows the the universe, and time itself, had a beginning at the big bang.
  5. The “oscillating” model requires that the expansion of the universe reverse into a collapse, (= crunch).
  6. In 1998, the discovery of the year was that the universe would expand forever. There will be no crunch.
  7. Therefore, the oscillating model is disconfirmed by observations.
  8. The oscillating model also faces theoretical problems with the “bounce” mechanism.

Atheism also requires an eternal universe, according the Secular Humanist Manifesto:

FIRST: Religious humanists regard the universe as self-existing and not created.

One of the eternal models of the universe favored by atheists was proposed by Carl Sagan:

[I]nformation from our universe would not trickle into that next one and, from our vantage point, such an oscillating cosmology is as definitive and depressing an end as the expansion that never stops” (Sagan, Carl (1979), “Will It All End in a Fireball?” Science Digest, 86[3]:13-14, September, pp 13-14)

Again, this atheist cosmology, like the Hindu cosmology, is falsified by the evidence – both theoretical and experimental. Now, lots of people believed Carl Sagan, but the progress of science proved that his atheism was wrong. His whole cosmology was wrong. That’s a pretty big mistake to make, but that’s what you get when you invent a self-serving worldview that goes against the progress of science.

Falsifying a religion using history

Consider this argument:

  1. To be a Muslim, you must believe that the Koran is without error.
  2. The Koran claims that Jesus did not die on a cross. (Qur’an, 4: 157-158)
  3. The crucifixion of Jesus is undisputed among non-Muslim historians, including atheist historians.
  4. Therefore, it is not rational for me to become a Muslim.

I’m going to support the premise that Jesus was crucified by citing historians from all backgrounds.

Consider some quotes from the (mostly) non-Christian scholars below:

“Jesus’ death as a consequence of crucifixion is indisputable.” Gert Lüdemann

“That he was crucified is as sure as anything historical can ever be.”  J.D. Crossan

“The passion of Jesus is part of history.” Geza Vermes

Jesus’ death by crucifixion is “historically certain”. Pinchas Lapide

“The single most solid fact about Jesus’ life is his death: he was executed by the Roman prefect Pilate, on or around Passover, in the manner Rome reserved particularly for political insurrectionists, namely, crucifixion.” Paula Fredriksen

“The support for the mode of his death, its agents, and perhaps its co-agents, is overwhelming: Jesus faced a trial before his death, was condemned, and was executed by crucifixion.” L.T. Johnson

“One of the most certain facts of history is that Jesus was crucified on orders of the Roman prefect of Judea, Ponitus Pilate.” Bart Ehrman

That’s 7 famous historians: 3 atheists, 3 Jews and 1 moderate Catholic. The atheists, Ludemann, Crossan and Ehrman, have all debated against the resurrection of Jesus with William Lane Craig. Johnson is the moderate Catholic, the rest are Jewish historians. The Koran was written in the 7th century. That is why no professional historian accepts the Koran as more authoritative than the many earlier Christian and non-Christian sources for the crucifixion story. Many of the sources for the crucifixion are dated to the 1st century. The Koran is simply too far after the events to be reliable history, especially since it often contradicts earlier sources, both Christian and non-Christian.

Notice how my criticisms of these religions are very much different than what you hear from atheists. My evidence is specific and scholarly. I’m not claiming that these religions are false because it conflicts with my personal preferences. That would be a very stupid way of arguing against a religion. What you have to do is find a claim that is central to the religion and then falsify it using evidence that is incontrovertible. No one cares if you think the universe is too vast. No one cares if you think the eye is badly designed. That’s just an opinion. That’s a personal preference. Even moral claims are personal preferences on atheism. God isn’t bound by any one person’s preferences. To falsify a worldview, you have to find clear evidence that is at odds with a core claim of that religion.

Christopher Hitchens is a good example of someone who uses his feelings and personal preferences to make an emotional case against theism, for example. I sort of consider him to be more of a comedian than a scholar, but rank-and-file atheists really go for him. He didn’t do very well in his debate with William Lane Craig, that’s for sure. He is trying to disprove a worldview the wrong way – with snarky opinions. That’s not the way to get to the truth.

Conclusion

So, the point here is that it’s not that Hindus and Muslims are bad people, and it’s not that they are unhappy people. It’s that they have false beliefs. And it’s the falseness of their beliefs that is important to God. It’s not God’s purpose that we are sincere in our beliefs, regardless of whether they are true. It’s not God’s purpose that we feel happy and content. It’s not God’s purpose that we are liked by others. God’s purpose for us is that we have true beliefs about him, his existence, and what he has done in history, and the spiritual meaning of what he’s done. And he expects a proper response to knowing the truth about him in the way we live our lives, too. The truth comes first, then the actions. 

A sincere Hindu or Muslim or Mormon or atheist may be very adept at complying with the moral standards of their families and communities. They may feel very confident in the meaningfulness of their plans and achievements in this world. They may feel that they have lived a good life, one that they are happy about. They may have friends and family who affirm the goodness of their beliefs and actions. But in the end, that is not the purpose of life – we don’t decide what we are here to do, since we didn’t choose to be here. Someone else made us for a purpose. We didn’t create and design this universe.

I think people who spend their entire lives in a non-Christian religion or no religion obviously invent a story for themselves that makes them feel comfortable. The real question that everyone has to answer is “is it true?”. And for that, we look to the evidence. We do not look to our feelings. We do not look to our friends. We do not look to our family. We do not look to customs and traditions. We look to the evidence and we fashion and proportion our beliefs to the evidence.

Videos

William Lane Craig lectures on naturalistic alternatives to the Big Bang

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Here’s the lecture, which was given in 2004 at the University of Colorado, Boulder. A very liberal university!

This lecture might be a little advanced for beginners, but if you stretch your mind first, you shouldn’t tear anything. (Note: standard disclaimers apply if you do tear something!)

The description of the video states:

This is quite simply one of the best lectures William Lane Craig (a philosopher of science) has given. Craig explores the origins of the universe. He argues for a beginning of the universe, while refuting scientific models like the Steady State Theory, the Oscillating Theory, Quantum Vacuum Fluctuation Model, Chaotic Inflationary Theory, Quantum Gravity Theory, String Theory, M-Theory and Cyclic Ekpyrotic Theory.

And here is the description of the lecture from Reasonable Faith:

A Templeton Foundation lecture at the University of Colorado, Boulder, laying out the case from contemporary cosmology for the beginning of the universe and its theological implications. Includes a lengthy Q & A period which features previous critics and debate opponents of Dr. Craig who were in attendance, including Michael Tooley, Victor Stenger, and Arnold Guminski.

Craig has previously debated famous atheists Stenger and Tooley previously. And they both asked him questions in the Q&A time of this lecture. Imagine – having laid out your entire case to two people who have debated you before and who know your arguments well. What did they ask Craig, and how did he respond?

The scientific evidence

The Big Bang cosmology that Dr. Craig presents is the standard model for how the universe came into being. It is a theory based on six lines of experimental evidence.

Scientific evidence:

  1. Einstein’s theory of general relativity (GTR)
  2. the red-shifting of light from distant galaxies implies an expanding universe
  3. the cosmic background radiation (which also disproves the oscillating model of the universe)
  4. the second law of thermodynamics applied to star formation theory
  5. hydrogen-helium abundance predictions
  6. radioactive element abundance predictions

If you are looking for some detail on these evidences, here’s a re-cap of the three main evidences for the Big Bang cosmology from Caltech. (Numbers 2, 3 and 5 from the list above)

Excerpt:

Until the early 1900s, most people had assumed that the universe was fixed in size. New possibilities opened up in 1915, when Einstein formulated his famous general relativity theory that describes the nature of space, time, and gravity. This theory allows for expansion or contraction of the fabric of space. In 1917, astronomer Willem de Sitter applied this theory to the entire universe and boldly went on to show that the universe could be expanding. Aleksandr Friedmann, a mathematician, reached the same conclusion in a more general way in 1922, as did Georges Lemaître, a cosmologist and a Jesuit, in 1927. This step was revolutionary since the accepted view at the time was that the universe was static in size. Tracing back this expanding universe, Lemaître imagined all matter initially contained in a tiny universe and then exploding. These thoughts introduced amazing new possibilities for the universe, but were independent of observation at that time.

Why Do We Think the Big Bang Happened?

Three main observational results over the past century led astronomers to become certain that the universe began with the big bang. First, they found out that the universe is expanding—meaning that the separations between galaxies are becoming larger and larger. This led them to deduce that everything used to be extremely close together before some kind of explosion. Second, the big bang perfectly explains the abundance of helium and other nuclei like deuterium (an isotope of hydrogen) in the universe. A hot, dense, and expanding environment at the beginning could produce these nuclei in the abundance we observe today. Third, astronomers could actually observe the cosmic background radiation—the afterglow of the explosion—from every direction in the universe. This last evidence so conclusively confirmed the theory of the universe’s beginning that Stephen Hawking said, “It is the discovery of the century, if not of all time.”

It’s probably a good idea to be familiar with these if you are presenting this argument, because experimental science is a reliable way of knowing about reality.

Published research paper

This lecture by Dr. Craig is based on a research paper published in an astrophysics journal, and was delivered to an audience of students and faculty, including atheist physicist Victor Stenger and prominent atheist philosopher Michael Tooley, at the University of Colorado at Boulder.

Here’s the peer-reviewed article that the lecture is based on.

Here’s the abstract:

Both cosmology and philosophy trace their roots to the wonder felt by the ancient Greeks as they contemplated the universe. The ultimate question remains why the universe exists rather than nothing. This question led Leibniz to postulate the existence of a metaphysically necessary being, which he identified as God. Leibniz’s critics, however, disputed this identification, claiming that the space-time universe itself may be the metaphysically necessary being. The discovery during this century that the universe began to exist, however, calls into question the universe’s status as metaphysically necessary, since any necessary being must be eternal in its existence. Although various cosmogonic models claiming to avert the beginning of the universe predicted by the standard model have been and continue to be offered, no model involving an eternal universe has proved as plausible as the standard model. Unless we are to assert that the universe simply sprang into being uncaused out of nothing, we are thus led to Leibniz’s conclusion. Several objections to inferring a supernatural cause of the origin of the universe are considered and found to be unsound.

The whole text of the article is posted online here.

If you want something to post on your Twitter or Facebook that is much shorter than this lecture, then you should check out this quick 4-minute explanation of the kalam argument.