ciphergoth comments on Undiscriminating Skepticism - Less Wrong
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It's hard to get people to answer such things straightforwardly. I once included "Some people have fingernails" in a poll, as about the most uncontroversially true thing I could think of, and participants found a way to argue that it wasn't true - since "some" understates the proportion.
Well... Some people does usually implicate ‘not all people, and not even all people except a non-sizeable minority’, but if we go by implicatures rather than literal meanings, X has fingernails (in contexts where everyone knows X is a human), in my experience at least, usually implicates that X's fingernails are not trimmed nearly as short as possible, since the literal meaning would be quite uninformative once you know X is a human.
"There exists at least one X that ..." is what logicians have settled on as the most easily satisfiable and least objectionable phrasing.