I think you get the gist of it given we've had a couple of exchanges already, but my reasoning goes like this:
Kantian Coherentism offers an alternative to foundationalism by viewing knowledge and justification as a holistic "web of beliefs" rather than a hierarchy of basic and derived beliefs. To borrow from atheist philosopher W.V. Quine, in "Two Dogmas of Empiricism," he describes this web as a human-made fabric that interacts with experience only at its edges, constantly revised to align with sensory input. Coherentism rejects the foundationalist "dogma of reductionism" - the idea that individual statements can be directly tied to specific sensory events for validation - proposing instead that statements gain meaning and truth collectively within the web. This challenges Natural Theology’s (argued by men like Aquinas) reliance on a foundationalist, evidentialist approach, which assumes theory-independent facts and neutral evidence. Coherentists, along with thinkers like Wilfrid Sellars and the Duhem-Quine thesis, argue that
all observations are theory-laden, with no neutral "givens" or basic meanings, and that evidence alone underdetermines theory choice. Sellars’ critique of the "myth of the given" further undermines foundationalism by
showing that no empirical datum can serve as an unassailable epistemic foundation.
However, coherentism faces its own issues: it resembles a form of foundationalism where all beliefs are foundational, yet struggles with circularity. If no belief in the web is independently justified, the entire system lacks grounding. This inadequacy points toward transcendental arguments as a potential resolution, shifting focus to the preconditions necessary for justification itself.
I'd bet you're familiar, but my form of a transcendental argument would be as follows:
X is a necessary condition for the possibility of Y, such that Y cannot obtain without X. Further, given that X would be a condition for Y, it is said that the claim (Y if then X) is not merely an
a posteriori necessary truth established according to the natural laws governing our actual world, but that it is an
a priori and metaphysical necessary truth. In other words, the truth of this claim is not discovered through experience by the empirical sciences (e.g. oxygen = O2), but rather this truth holds metaphysically such that X is a condition for Y in every possible world. Therefore, the claim made by the transcendental argument, that X is a condition for Y, amounts to ‘X is a necessary condition for Y,’ and this necessary condition possesses modal strength. Within the transcendental argument, not only is X a necessary condition for human reason or thought, it is a necessary condition for the
possibility of human reason. For even if there were no human thought or reason in existence, X would still have to exist, since X is a necessary condition for the logical possibility of human thought at all. Therefore, according to S5 modal logic, we can ascribe modal operators to our premises when formally representing our transcendental argument in the following valid deductive syllogism:
- Reason (Y) is possible in some world.
- It’s necessarily true that reason is possible (via S5’s axiom 5).
- It’s necessarily true that if reason is possible, then X (God) must hold.
- From (3) and axiom K, you get that if reason’s possibility is necessary, X’s necessity follows.
- Therefore, X is necessarily true in all possible worlds.
This argument is a presuppositional argument that challenges the foundational assumptions of other worldviews, distinct from the God-of-the-gaps argument (which is a falacy). It asserts that everyone operates with presuppositions (e.g., the reliability of logic, reason, and evidence) and rejects the idea of presuppositional neutrality as claimed by Natural Theology or classical foundationalism as we've already concluded that all observations are theory-laden. Reason, logic, and argumentation aren’t proven by experience - they’re the tools used to prove everything else. Yet, justifying their validity poses a problem: relying on reason to validate reason is circular and question-begging. This argument addresses this by seeking the preconditions necessary for reason, logic, and argumentation to function. It follows the form: for X (e.g., rational processes) to be possible, Y (God) must be true as its necessary condition, since X exists, Y must exist. Thus, I argue that God is the precondition for rationality itself.