Typically, a transcendental argument starts from some proposition, and then makes the case that its truth or falsehood contradicts the necessary conditions for it to be possible to know, think or argue about it.
So-called progressive transcendental arguments begin with an apparently indubitable and universally accepted statement about people's experiences of the world.
Briefly, Kant shows that: He has not established that outer objects exist, but only that the concept of them is legitimate, contrary to idealism.
The Dutch philosopher Herman Dooyeweerd used transcendental critique to establish the conditions that make a theoretical (or scientific) attitude of thought (not just the process of thinking, as in Kant) possible.
[7] In particular, he showed that theoretical thought is not independent (or neutral) of pre-commitments and relationships but are rather grounded in commitments, attitudes, and presuppositions that are "religious" in nature.