I think that confronted with the statement:
The claim is fictitious.
or even
The claim is made up.
most people would interpret it to mean, "The claim was actually made, but its content is made up," but I think it could also be taken to mean, "The claim was never made; its existence was made up."
Is there some usage or variant of "fictitious" that unambiguously means the latter?
Of course you can get around it by using a completely different sentence, like the one I just did ("The claim has never been made"), but I'm wondering whether there's an accepted alternative that keeps the nefarious connotations of "fictitious":
- The former ("fictitious content") could be a lie, invented to lend credibility to a weak argument. "I wasn't in the area on the night of the crime."
- The latter ("fictitious existence") could be a claim maliciously invented in order to attribute it to someone. The claim itself was never made by anyone, and (even if true) is fictitious in the "existence" sense (although attributing it to someone else is of course fictitious in the "content" sense).
I wondered at first whether that might be why we have both fictional and fictitious, but it seems that fictional is intended to be reserved for works of fiction.