The sandwich will have G unless it has T.

[xinglipku]

I can diagram this correctly, but when thinking about the meaning of this sentence, I can't quite understand why T---~G is incorrect. Can you please elaborate a bit or give an example?

Thanks!

[timmydoeslsat]

I can diagram this correctly, but when thinking about the meaning of this sentence, I can't quite understand why T---~G is incorrect. Can you please elaborate a bit or give an example?

Thanks!

You will take the LSAT unless you win the lottery.

~Take LSAT ---> Win lottery

To think about this in a logic frame work, we know what is necessary for you to not take the LSAT. However, even if the necessary condition presented itself, it isn't guaranteed that the LSAT will not be taken.

[miraalkhan911]

I agree with,Thanks for reply

[pcirka1]

But isn't stating that

"You will take the LSAT unless you win the lottery"

identical to

"You will not take the LSAT if you do win the lottery"?

Not in logic--in common language?

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