Pawn I don’t think there is one. That is axiomatic, as described by Aristotle. Try making any argument, even those here, without assuming that existence exists and that valid concepts refer to reality. It falls apart very quickly.
This is really is a very old philosophical problem on which much ink has been used. So I certainly can’t find a way logically outside that to explain here and would just suggest reading Aristotle on that.
But perhaps Kevin’s Bacon will have more to discuss about it.
There is one other aspect of this I think is interesting to consider as a neuroscientist. From my perspective all our thoughts and concepts correspond to some activity of neurons in our brain. And our brain is an evolved organ which evolved to help us predict the environment and act in ways that propagated our genes.
So in this sense logic and axioms are fundamental arrangements of activity that help us achieve that goal.
Something to ponder.
Yeah I love this insight, I used it to formulate a sort of basis for my own codified epistemology that's roughly based on a realist interpretation of Kant (screw idealism or the assumption that the real world is unknowable and dismissable). Piaget also has something that sort of answers this as saying that every truth is a tool in a framework within which it applies. But I haven't read much about it yet, just discovered him.
Realism rules. Aquinas is the GOAT
You don't happen to know portuguese, do you? The best book I've ever read on the topic of gnosiology and epistemology is "Gnosiologia Pluridimensional", by the latvian Father Stanislavs Ladusãns, but it was written in portuguese and has no translations that I know of. This book is a gem. If you can, try to find it and ask for help translating it. It would be a great service to the philosophy world
