Talk:All and only

Does any one else use it?[edit]

I can find 1460 matches on Google book search. [1] But I guess it may be a neologism. Egriffin 18:17, 1 August 2007 (UTC)[reply]

My mistake. However, among the first 20, 2 are accidental uses, and a number aren't in set theory. I think, perhaps, we should just redirect this one to if and only if. — Arthur Rubin | (talk) 18:49, 1 August 2007 (UTC)[reply]

Examples:

... there can be no ... "Px" true of all and only the events having some.... (mathematical logic, rather than set theory
Generation of all-and-only grammatical strings (formal grammar, I believe)
What is common to all and only instances of doubting (philosophy? logic? but not mathematical logic or set theory)

— Arthur Rubin | (talk) 18:54, 1 August 2007 (UTC)[reply]

Changed to redirect. If I missed some other common usages, please edit the if and only if article. — Arthur Rubin | (talk) 19:15, 1 August 2007 (UTC)[reply]

Ok that's fair. Egriffin 19:40, 1 August 2007 (UTC)[reply]