What the hell does this even mean??? "well defined"??? You quibble with Rand's definition of existence because she wasn't needlessly verbose???
So, "perceptual reality" is unjustified? Hmm, interesting... And how do
you discern reality, that is, if you acknowledge reality at all?
P.S. -- You are a classic example of one who uses the "stolen concept fallacy" as a method of argument (See also Aristotle's
"reaffirmation through denial"). You use the very concepts you deny in a fraudulent attempt to "prove" your argument to be correct. You attempt to negate reason by means of reason. You question the validity of existence while ignoring the fact that you have to exist
first before positing such a query. You deny axioms, namely the Primacy of Existence, and completely ignore the fact that if it wasn't for this irreducible primary you wouldn't be here stinking up the place with your freshman level regurgitation of Cartesian nonsense. You, sadly, are trying to prove
"I think, therefore I am" while ignoring the epistemological fact that there has to be an
"I" first (existence) before there can be any
"thinking" (consciousness) that takes place. (The proper term reads:
"I am, therefore I think".)