logical opposites

Bumblebee

Hello!
Im having trouble with logical opposites.

Is "not all= some are not"

Is the logical opposite of
"some are not= all"

Thank u so much!

BinghamtonDave

It is my understanding that you are both essentially correct.
All = 100%
logical opposite
Not all= not 100%

Some are not=Not all, which= not 100%
logical opposite
All=100%

That is the core relationship here. Where I would suggest going from here to deepen our understanding is to write out the various ways these ideas are expressed in English on the LSAT. For instance
"All" can be expressed as "every"

Play around with these concepts, connect them in a systematic way and try view the relationships as intuitively as you can, it will pay off when you hit the questions.

David

Bumblebee

Thank you guys!!