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Full Idea
Aristotle's system accepted as correct some laws which nowadays we reject, for example |= (Some Fs are G) or (some Fs are not G). He failed to take into account the possibility of there being no Fs at all.
Gist of Idea
Aristotle's said some Fs are G or some Fs are not G, forgetting that there might be no Fs
Source
comment on Aristotle (Prior Analytics [c.328 BCE]) by David Bostock - Intermediate Logic 8.4
Book Ref
Bostock,David: 'Intermediate Logic' [OUP 1997], p.353
Related Idea
Idea 14453 The Darapti syllogism is fallacious: All M is S, all M is P, so some S is P' - but if there is no M? [Russell]