(Oct 28, 2025 06:09 AM)Magical Realist Wrote: All my beloved tulpas nest comfortably inside my head. But then so do I as well as the rest of my Universe. Real after all is just a state of mind [...]
When the imaginary entities did appear in the external environment (hallucinations) that was indeed the evidence that old-time philosophers needed that the manifested external world was a representation abiding in the head. But that in itself certainly does not eliminate a truly brain-independent or mindless external world that consequently exists invisibly in its native state (barring panpsychism). "Representation" entails something that it is a copy of (even if an unfaithful or inaccurate imitation).
OTOH, though, the representation itself does have objective features. One cannot control or alter it by will or desire alone (as with daydreams) -- it is regulated by its own rules. And other humans report that their "operating systems" generate the same environment (it may be a product of mind or neural tissue, but it is inter-subjective -- has global reach rather than being purely private and personal).
So even if there was not an ultimate or noumenal external world, our empirical or phenomenal version of one still adequately serves as such. Mach contended that the former was even superfluous. But all the multiple and rival ways of modelling it, to derive predictions, means that the "idea" of it has practical value -- the concept of an ultimate external world is not useless.