In the long run everything is measurable. In the long run everything is also subservient to semantics. Probably not even "good" semantics. Probably the semantics that define the parameters under which most communication occurs.
Propaganda will last until the stars burn out. I say "male-bodied woman", you say "man with feminine brain". It all converges on the same facts eventually. Truth gets paid its due either way. Nobody ever has to admit they're wrong. Truth never kills its hosts, even when it should