Well put. And that is not what JD said. Logic itself is just a tool. A logical argument can be correct and still unsound, based upon the premises.
Every elephant can sing.
Jumbo is an elephant.
Therefore Jumbo can sing.
That is a logically valid, yet unsound argument.
if the premise is demonstrably wrong, of course. no elephant can sing.
Right on. The fundamental question is the nature of existence. STEM is what we know, since (as you said) solipsism does not lead anywhere. Likewise we know that non-physical entites exist.
Concepts and ideas. These are the product of our minds, whch are the products of our brains. Non-physical entities are “inert”, physical existence is “active”.
So we know two types of existence. The queston is, if there is a third type of existence, which is non-physical, yet active, which can influence the physical reality, yet is immune to the active physical actions.
This third kind of existence is what posited by Aquinas.
i dont think that is what he proposes is a third existence. or at least that G-d or a first cause is.
here is why i dont.
if something has any physical qaulities, it is physical, subject to physical laws, or some combination of them, making its behavior at least statistically predictable. i.e vacuum, virtual particles, tachyons, etc
lacking those qaulities would make an object non-physical.
there would seem to be only 2 states, things that are physical, and things that aren’t.
of course as theists, we dont have aproblem with the interaction of the physical and non-physical,
from a secular point, first cause was operative prior to the establishment of any of the physical laws based on our universal constants.
just like two inert chemicals can be used to mix a chemically active compound, there is no reason to believe that a non-physical first cause must be physically ‘active’ to create matter, any more than an inert chemical need be ‘active’ in order to form an active compound with another inert chemical
further, the ‘rules’ that we now see for matter did not yet exist. because, the universeal constants that give us the physical laws, were not yet formed.
as an aside, concepts and ideas are not non-physical entities, apart from the chemical interactions in your brain, they simply dont exist at all.