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Zach on December 18 at 05:07AM

I incorrectly chose A instead of C.

It appears the only difference between A and C is "only if" (A) versus "if" (C). Why is A wrong and C correct? Thank you!

1 Reply

Shunhe on December 21 at 02:28PM

Hi @zachmorley2,

Thanks for the question! The sufficient and necessary module will clear up a lot of this, so would highly recommend. But basically, “if” introduces the sufficient condition, and “only if” introduces the necessary condition. So “if you come over, I’ll make dinner” is diagrammed

You come over —> I make dinner

But “only if you come over will I make dinner” is diagrammed

I make dinner —> You come over

And so these are flipped from each other! They don’t say the same thing at all, and here, that’s what makes (C) better than (A).

Hope this helps! Feel free to ask any other questions that you might have.