"if and only if" not the same as "only if", right? Forum

WeX11788 · Post by **WeX11788** » Tue Sep 28, 2010 8:35 pm

I haven't seen a game with "only if" in a whiiiiiiiile but I've been getting a lot of "if and only if" and I want to be certain that a simple "only if" is not indicative of a double arrow <---->

J only if X should be diagrammed as

J ---> X

Right? Thanks.

Destined · Post by **Destined** » Tue Sep 28, 2010 8:39 pm

you got it right. Whenever you see "only if" translate it to a "then"

niederbomb · Post by **niederbomb** » Tue Sep 28, 2010 8:54 pm

"G helps move S if, but only if, H helps
move R."

PT 56, Game 2

Gs----> Hr and Hr-----> Gs

Right?

LSAT Blog · Post by **LSAT Blog** » Tue Sep 28, 2010 8:59 pm

Right.

Best summarized as:

Gs <----> Hr

"if and only if" not the same as "only if", right? Forum

"if and only if" not the same as "only if", right?

Re: "if and only if" not the same as "only if", right?

Re: "if and only if" not the same as "only if", right?

Re: "if and only if" not the same as "only if", right?

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