Full Idea
It is not meaningless for me to postulate the potential for humans to sense in a manner which is at present unimaginable and indescribable. There is no reason to believe me, but I might be right.
Gist of Idea
I can meaningfully speculate that humans may have experiences currently impossible for us
Source
David E. Cooper (Philosophy and the Nature of Language [1973], §3.1)
Book Reference
Cooper,David E.: 'Philosophy and the Nature of Language' [Longman 1979], p.50
A Reaction
The key counterexample to verificationist theories of meaning is wild speculations, which are clearly meaningful, though frequently far beyond any likely human experience. Logical positivists are allergic to imagination.