Not all As are Bs.All As are Cs.What can you properly infer?

EvanF May 3, 2016

Daily Drill Question #3

I am struggling to see the difference between A and B

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Mehran May 6, 2016

@EvanF let's break it down.

"Not all Bs are Cs" means that at least one B is not a C, i.e. some Bs are not Cs, which we write out as follows:

B-some-not C

"Not all Cs are Bs" means that at least one C is not a B, i.e. some Cs are not Bs, which we write out as follows:

C-some-not B

For a more in-depth review of these concepts, watch our lesson on Quantifiers.

Hope that helps! Please let us know if you have any other questions.