"Mostly empty space" isn't related, but is a valid point when considering the different matter (pun intended) of the solidity and physical character of macroscopic things like chairs.

"Illusion" in its usage here referred to the latter.

Just because something isn’t the way we expected doesn’t imply that there isn’t an objective, underlying reality.

And that’s the heart of what nonlocal deterministic interpretations try to answer.

Given the chance.

"in the clearly definable way we normally understand"

Misquoting me and replying to that is the strawman approach, though I give you the benefit of the doubt and assume you just misinterpreted me.

That bit doesn’t add to the assertion that something isn’t real, or that there isn’t an underlying objective reality.

If something doesn’t exist in the classical objective sense, then it means that something doesn’t exist or have meaning outside of an observer. It’s not empirical nor measurable.

That’s not the same as saying that the building blocks are quite different from everyday experience. It’s still measurable, real, and well-defined. Just not in the ways that are intuitive.

Of course it adds to the assertion, I was careful to add it for that reason.

Again, assuming good faith (despite your original unnecessary "strawman" tone), I will assume you were just mistaken in your omission or misreading of it.

Logic is not probabilistic, but it is referential and not absolute.

Except ..... that's not the right way to measure size, you measure the size of a particle by the forces interacting with it.

By that measure an electron has an infinite size (since an electric field is infinite), and a chair has exactly the size it appears to have, because that's the size measured when you interact with it electromagnetically.

Objects don't have one single size, their size varies depending on what tool you use to measure them.

All parts, remain as parts of the environment, the whole.