Philosophy

Are We Living in a Computer Simulation?

/ Apologetics, Philosophy, Technology / 6 Comments

(Spoiler: Betteridge’s law applies.)

I’ve been asked several times recently how I would respond to the claim that we are (or might well be) living inside a computer simulation. I don’t think the folk who pose the question to me are themselves worried the claim might be true; rather, they recognize it as a new kind of skeptical challenge and they’re curious to know how Christians might respond to it. Also, I suspect they’ve encountered some unbelievers who use the simulation hypothesis as a kind of nuclear option to derail serious discussions about the evidence for Christian claims. (“How do you know you haven’t been brainwashed into believing Christianity? How do you know you’re not being deceived by a malevolent demon? How do you know you’re not in a dream right now? How do you know the entire universe isn’t just an elaborate computer simulation? Huh? Huh?”)

As it happens, there are some smart people who take the simulation hypothesis seriously: Nick Bostrom, Elon Musk, Neil deGrasse Tyson, and Scott Adams, among others. They don’t necessarily believe it, but they don’t think it’s implausible. So what can be said in response? Can the hypothesis be refuted?

…

Are We Living in a Computer Simulation?Read More »

Grudem’s Christian Ethics and Other Themeliana

/ Ethics, Philosophy, Theology

My review of Wayne Grudem’s Christian Ethics appears in the latest issue of Themelios. (In case you’re left wondering: yes, I actually used a set of scales.)

The April 2019 issue is quite a treat. Some highlights:

Something for everyone!

Iron-Man Dualism

/ Apologetics, Philosophy / 8 Comments

One common argument against substance (mind-body) dualism runs as follows. We know that consciousness is dependent on the brain, because when the brain is damaged it adversely affects consciousness and mental function. (You can prove this point to yourself experimentally by hitting yourself hard on the head with a brick.) Furthermore, it is argued, when brain function ceases altogether, consciousness disappears. (Don’t try to prove this latter point to yourself experimentally; just take it on trust.) Therefore, contra substance dualism, the mind — if it’s a real entity at all — must be ontologically dependent on the physical structures of the brain. We should be physicalists of some kind.

I come across this argument all the time in the writings of naturalists, but it strikes me as a blatant non sequitur. At most it shows that there’s a causal relationship between the mind and the body, which substance dualists insist upon anyway. (The so-called “interaction problem,” which is concerned with how there can be causation between physical and non-physical substances, is a different challenge to dualism, one I don’t propose to address here.) The fact that increasing damage to the brain leads to increasing mental impairment doesn’t at all imply that the mind cannot exist apart from the brain.

Here’s an analogy to elucidate why that’s so. Imagine a spaceship of the kind familiar from sci-fi movies. In this spaceship, the cockpit doubles up as an escape pod. In normal operation, the cockpit is attached to the main ship; whenever the ship moves, the cockpit moves with it, just as it should. If the ship is attacked with (say) photon torpedoes, the cockpit is buffeted about along with the rest of the spacecraft. When the ship is damaged, all of its systems can be affected; thus the operation of the cockpit can be impaired by damage to the ship in which it is housed.

If the ship becomes so badly damaged that it can’t move at all, the cockpit is stuck along with it, since it’s fixed to the ship. But if the spaceship is completely blown apart, the cockpit functions as an escape pod: it can detach from the doomed ship, and once detached, it can move freely again. (In line with a Christian eschatology, we could even extend the analogy such that if the parts of the ship are recovered and reassembled, the cockpit can be reattached — but that’s not necessary for the point I’m making here.)

…

Iron-Man DualismRead More »

Faith and Philosophy Journal Now Open-Access

/ Philosophy

Splendid news: Faith and Philosophy, the journal of the Society of Christian Philosophers, is now open-access. Kudos to the SCP Executive Committee for that decision and its execution. All articles and book reviews from all past issues (dating back to 1984) are freely available for PDF download.

Faith and Philosophy

The journal archive includes many classic articles by luminaries such as William Alston, Robert Adams, Marilyn McCord Adams, Alvin Plantinga, George Mavrodes, Eleanore Stump, Richard Swinburne, Nicholas Wolterstorff, Peter van Inwagen, and William Wainwright, to name but a handful. Happy reading!

Determined to Believe?

/ Philosophy, Theology

Determined to Believe?John Lennox is Emeritus Professor of Mathematics at the University of Oxford and an evangelical Christian with a longstanding concern to defend the Christian faith in the public sphere. In recent years he has risen to prominence as an articulate, well-informed, and winsome apologist, writing books on the relationship between Christianity and science, and engaging in public debates with prominent skeptics such as Richard Dawkins, Christopher Hitchens, and Michael Ruse. His 2007 book God’s Undertaker, which I have often recommended to my students, deftly debunks the myth of conflict between religion and science. I wish I could be so enthusiastic about his recent foray into systematic and philosophical theology, which might well have been titled Calvinism’s Undertaker.

As Lennox explains, his latest book “is written mainly for Christians who are interested in or even troubled by questions about God’s sovereignty and human freedom and responsibility” (15). Having been asked on many occasions to share his views on this thorny issue, Lennox decided to embark upon a book-length treatment of the topic. The primary target of his book is theistic determinism, which Lennox nowhere explicitly defines but apparently takes to be the view that God determines—more specifically, causally determines—every event in the creation, including the decisions and actions of his creatures. The book consists of 20 chapters and is divided into five parts. In this review I will summarize the content of each part, offering some critical comments along the way, before concluding with some concerns prompted by the book’s title.

Read the rest of the review here.

Is Calvinism Unliveable?

/ Philosophy, Theology

It’s sometimes claimed that determinism is irrational because (so the argument goes) one can’t consistently believe that one’s beliefs are determined. Occasionally this is transposed into an objection to Calvinism, since Calvinism is arguably committed to theistic determinism.

Let’s take a look at a recent example from William Lane Craig’s weekly Q&A blog and consider whether the objection has any substance. (Craig’s article was reproduced on Biola University’s blog several months later, so it has had some exposure.)

A correspondent writes to Dr. Craig:

As a former agnostic, one of the most powerful apologetic arguments against naturalism, atheism (and so on) is the idea that nobody strives to be a *consistent* naturalist/atheist/etc. In other words, they fail to act in accordance with the nihilism to which many of these ideas logically lead. Being more than a little curious, I stumbled into the free will position within Calvinism. Doesn’t this lead to a similar problem? In other words, what exactly does a consistent Calvinist even look like?

What does a consistent Calvinist look like? Well, if you’re really curious, you can find out here. But moving on to Craig’s response:

I think that you’ve successfully identified a problem with determinism in general, Leif, of which Calvinism is but a specific instance, given the Calvinist’s view that God determines everything that happens.

Note first that Craig treats Calvinism as merely one species of the genus determinism, taking it that any problem with determinism in general must afflict Calvinism’s theistic determinism. I doubt things are that simple. It’s pretty difficult to generate an argument against determinism as such, which is why most anti-determinist arguments target particular types of determinism (e.g., physical determinism or nomological determinism).

…

Is Calvinism Unliveable?Read More »

Snowman Identity Over Time

/ Philosophy

An exchange with my five-year-old son:

“I just watched the Snowman movie. It’s kinda sad at the end.”

The Snowman“Why’s that?”

“Because the snowman melts. I hope the boy can build him up if it snows again.”

“But what if all the snow completely melts and there’s nothing left of him? If the boy builds up the snowman with new snow, would it be the same snowman or a different one?”

“I think it would be the same one.”

“Why do you think that?”

“Because the boy would use the same stuff to make him.”

“You mean the same hat, scarf, lumps of coal, and all that?”

“Yeah.”

“I think you could be right. Let’s hope it snows again.”

The Theological Foundations of Modern Science

/ Apologetics, Philosophy, Theology

Last week I had the privilege of giving the 2018 Tarwater Lecture at Queens University of Charlotte. The title of the lecture: “The Laws of Nature and of Nature’s God: The Theological Foundations of Modern Science.” Here’s the video:

Bonus points if you catch the numerical lapsus linguae in the first section!

Wikiality

/ Culture, Philosophy, Technology

My students know that I have very mixed feelings about Wikipedia. On the one hand, it can be invaluable for quickly obtaining or checking uncontested facts about names, dates, locations, and sequences of events. It can also be a useful starting point for research; it often provides a serviceable orientation to a topic and can point you to some useful sources. Even so, Wikipedia can be desperately unreliable and biased when it comes to controversial issues and even some matters that shouldn’t be controversial. (I have a folder on my computer named ‘Wikidpedia’ where I collect particularly egregious examples.) It’s well known that the ‘community’ of Wikipedia editors is ideologically skewed compared to the general population, such that some topics simply cannot be represented in a balanced and responsible fashion (see here for one embarrassing example).

Anyway, I recently came across an almost laughable case of Bad Wikipedia. For reasons I don’t remember now, I found myself consulting the entry on ‘Reality’ (insert your own punchline here). Here’s how the article began:

Reality is all of physical existence, as opposed to that which is merely imaginary. It is the name for all of physical existence, but the word is also used in a declension to speak of parts of reality that include the cognitive idea of an individual “reality” (i.e. psychology), to a “situational reality,” or a “fictional reality.”

The term is also used to refer to the ontological status of things, indicating their existence, but this is simply the idea of giving names to smaller “realities,” and seems vague and academic without the idea of physical existence as the first “reality,” and the others being smaller parts.

…

WikialityRead More »