'If and only if"

Ruby Soho

Does anyone have the link to the lesson reviewing "if and only if" ?

Thanks!!

J.Y. Ping

http://7sage.com/lesson/advanced-bi-conditionals/

Ruby Soho

Thank you JY )

AJ L

I've been noticing a lot of biconditionals in the rules of the logic games in the 50s PTs so far, and I believe the wording goes something like this:

Either A or B, and not both
indicates A<-->/B
same as A->/B and /A->B

If A then B otherwise not B.
indicates A<-->B and /A<-->/B
same as B<-->A and /B<-->/A

I hope I did that right.

Is there any other wording that would indicate biconditional?

Thank you JY for the LG videos they are SO helpful and much better diagrams than other books.