I think a more fundamental and seldom-agreed-upon question is what constitutes substance in the first place. I would argue that it’s very rare to find an answe

I think a more fundamental and seldom-agreed-upon question is what constitutes substance in the first place. I would argue that it’s very rare to find an answer that is truly coherent in that it corresponds to reality, is internally consistent, and doesn’t devolve into absurdity (turtles all the way down, etc.). I only know of one, and it’s rooted in the Christian worldview.