I agree with zefram, so do other people.
http://en.wikibooks.org/wiki/Formal_Logic/Sentential_Logic/Translations#Unless
"x unless y" <=> "if (not y) then x" <=> "x or y"
if (not y) then x follows.
if y then x may or may not be true.
I am happy unless it rains.
does this mean it is impossible for me to be happy when it is raining?
Quoting Zefram <[EMAIL PROTECTED]>:
Ed Murphy wrote:
5171 AGAINST (invisible F)
Ah, you're in the "unless" == "iff not" camp too? Curious. I had
no idea that interpretation of "unless" existed in formal logic.
I've always used it to mean "if not".
-zefram
--
Peekee
