Immanuel Kant

An Epistemological Argument Against Naturalism

/ Apologetics, Philosophy / 4 Comments

Consider the following epistemological argument against Naturalism (as defined below):

  1. If Naturalism is true, then all factual knowledge (i.e., knowledge of facts) is acquired empirically.
  2. Knowledge of necessary facts cannot be acquired empirically.
  3. We have some knowledge of necessary facts.
  4. Therefore, Naturalism is not true.

The insights behind the argument aren’t original to me, but the formulation is mine. Before I defend the three premises, let me clarify the key terms used in the argument.

Naturalism refers to the ontological thesis that only natural things exist, that is, things that exist spatiotemporally and can be described according to our best physical theories. On this definition, Naturalism is roughly equivalent to physicalism, the view that the fundamental ‘stuff’ of reality is physical and whatever exists can be accounted for (in principle) in terms of physical reality (physical particles, physical forces, etc.).1

Factual knowledge refers to knowledge of facts about the world; specifically, facts about an external world that exists independently of our minds. Factual knowledge is distinct from (1) analytical knowledge (i.e., knowledge of logical or conceptual truths, such as that a triangle is a polygon) and (2) knowledge of internal mental states (e.g., that I am currently experiencing pain). A simple example of factual knowledge would be that there are, at this present moment, more than two turtles in Turtle Pond.

Empirically means by way of sense experience or observation, that is, by means of our sensory organs (the standard five senses or any others we might have that operate on a similar basis).

Necessary facts are facts about what must be the case, as opposed to what merely is the case or could be the case. To know a necessary fact is to know not merely that something actually is the case, but also that it could not possibly have failed to be the case. Knowledge of necessary facts is a species of factual knowledge (as defined above).

Now, back to the argument. I think it’s fairly clear that the argument is logically valid: the conclusion follows from the three premises. If premises 2 and 3 are true, it follows that some factual knowledge is not acquired empirically, in which case — by modus tollens from premise 1 — Naturalism is not true.

So why think that the premises are true? Consider each in turn.

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  1. The physicalism could be reductive or non-reductive; I don’t think it makes a difference to the argument. Some self-professed naturalists hold to a more liberal ontology, e.g., allowing for sets or abstract mathematical objects. Whether those more liberal versions of naturalism are vulnerable to this argument is an open question that I won’t address here. ↩

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Did Cornelius Van Til Coin the Term “Transcendental Argument”?

/ Philosophy / 7 Comments

A transcendental argument, simply defined, is an argument purporting to demonstrate that some X (such as a particular concept, belief, or state of affairs) is a necessary precondition of some undeniable feature of human cognition (e.g., that we have orderly experiences or make judgments). At least, that is the conventional understanding of the term today. But who was the first to use the term in that sense?

Surprisingly, it might have been Cornelius Van Til.

I’m currently working on a monograph on Van Til’s transcendental argument for God (more precisely, for Christian theism). Preparatory research has required me to review everything Van Til says, explicitly or implicitly, about transcendental argumentation across his corpus, and to take a deep dive into the contemporary literature on transcendental arguments. In the process, I discovered something quite interesting.

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Reforming Apologetics (Transcendental Arguments)

/ Apologetics / 3 Comments

Previous posts:

Summary of Chapter 6

In this chapter, Dr. Fesko turns his attention to Van Til’s advocacy of the transcendental argument for the existence of God (hereafter, TAG). Fesko’s main concern is not that TAG is a bad argument in itself, but rather that many Van Tilians treat it as the be-all and end-all of Reformed apologetics, to the exclusion of other apologetic arguments (i.e., more traditional theistic arguments and historical evidential arguments). He writes:

This chapter argues that the TAG is a useful tool within the apologist’s toolbox but is neither a silver-bullet argument nor the most biblically pure form of Reformed apologetics. … The degree to which apologists employ the TAG apart from the book of nature is inversely proportional to the degree to which they depart from the historic Reformed faith. (p. 137)

This chapter’s thesis, therefore, is that the TAG can be a useful argument but not at the expense of the book of nature. Christians can employ the connection between the innate and acquired natural knowledge of God in the defense of the faith. (p. 137)

Dr. Fesko’s approach in the chapter is to review TAG’s origins in the philosophy of Immanuel Kant, to expose its “idealist elements,” and to raise some concerns about the use of TAG in Van Tilian apologetics.

Origin of Transcendental Arguments

The use of transcendental arguments can be traced to Kant’s attempt to refute idealism (specifically, skepticism about the existence of a mind-independent material world). The basic aim of a transcendental argument is to refute a skeptical position by showing that the skeptic has to presuppose the very thing he professes to doubt. Drawing from Robert Stern’s article in the Stanford Encyclopedia of Philosophy, Fesko writes:

Stated in simpler terms, transcendental arguments make a specific claim, namely, that X is necessary for Y to exist. If Y exists, then it logically follows that X must also be true. In other words, a transcendental argument argues by way of presupposition. (p. 139)

Fesko immediately connects TAG with the “historic worldview theory” (HWT) critiqued in the preceding chapter. James Orr advocated HWT and also employed a transcendental method (so Robert Knudsen argues), with the consequence that Orr repudiated proofs or evidential arguments for the existence of God. Gordon Clark followed Orr in these convictions. Van Til, despite acknowledging the legitimacy of evidence, “sounds very much like Orr” at points.

Fesko notes that Van Til’s disciples have debated among themselves the extent to which evidential arguments are appropriate in apologetics. Greg Bahnsen appeared to repudiate them altogether, while John Frame and Thom Notaro have defended their use and their compatibility with Van Til’s method. Even so, Fesko remarks, “there is a tendency to discount or diminish the use of evidence among some of those who employ the TAG” (p. 141).

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A Hume-Inspired Transcendental Argument

/ Apologetics, Philosophy / 1 Comment

The following excerpt is taken from David Hume by James N. Anderson (ISBN 978-1-62995-279-6) with permission from P&R Publishing Co, P.O. Box 817, Phillipsburg, NJ 08865 (www.prpbooks.com).

The problem of induction may be viewed as a particular instance of a more general epistemological problem. Is there any rational order to the facts of the world, and, if so, how can we have epistemic access to that rational order? How can the multifarious facts of experience be rationally connected, so as to give us genuine knowledge of the world and its operations?

David HumeHume’s answer, in effect, is that such knowledge is impossible. Given his starting point, his answer is correct. Kant considered this a philosophical scandal, even though he agreed with Hume that all factual knowledge of the world must come through sense experience. Kant’s innovative response to Hume’s skepticism was his “Copernican revolution” in epistemology: although we cannot know the world as it is in itself, we can know the world as it appears to us, because our minds impose rational order on the data of experience. Kant called his theory “transcendental idealism,” but we might just as well call it anthropocentric antirealism, for, on Kant’s view, the world of experience—the world we take ourselves to inhabit—isn’t a mind-independent reality, but rather a construction of the active human mind.

Kant’s system, while ingenious in its own way, fails to provide a satisfactory answer to the problems raised by Hume. Not only is it internally inconsistent (Kant couldn’t avoid making some positive claims about the unknowable noumenal world), but, like all forms of antirealism, it is haunted by the specter of epistemological relativism. If the world is a construction of the human mind, which human mind is doing the constructing? How can I be sure that the rational order I impose upon my experience is the same for everyone? Kant was the champion of intellectual autonomy—human reason must serve as the supreme judge—yet the existence of seven billion minds on earth implies seven billion independent and competing authorities.

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