Is the phrase, "cannot be meaningfully said to exist," equivalent to, "cannot exist?"
The first seems to me to be saying that we cannot make a positive assertion, the second is a negtive assertion. Am I correct?
You might think of the former as a subset of the latter.
The reason God cannot exist is that the entire framework upon which the concept of God or gods rested -- the mythic, supernatural worldview -- has collapsed, and has been replaced by a naturalistic worldview which is now the only game in town.
The old views of God still persist, but they are clearly contrary to fact, so we may dispense easily with them.
Yet the urge to believe in God, as well as the strong cultural traditions of belief, persist even among those who are aware of this fact.
So all sorts of dodges and subterfuges arise to attempt to prop up the dead theory.
These include:
The appeal to the cookie jar.
Humpty-dumptyism.
Inventing entirely imaginary (unanchored) ad hoc realms devoid of qualities which serve only to house God.
Appealing to a future definition (one of the most bizarre ploys in the bag).
Defining God as equivalent to not-God.
Some of these devices are easily exposed by careful examination, which reveals that the conditions they propose (under which God may exist) require us to accept that God may be real only if "real" ceases to be different from "not real", or if "God" ceases to be different from "not God", or if "exist" ceases to be different from "not exist".
So there is a subset of false arguments for God which rest upon rendering the statement "God exists" non-meaningful.