A set problem

[grave elk]

1. Ask your question and show the work you've done so far. If you've posted a screenshot of a question, specify which part you need help with.
2. Wait patiently for a helper to come along.
3. Once someone helps you, say thank you and close the thread with:

   +close
   

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6. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[arctic charm]

does AB mean A and B?

it should be neither of those then

this is your original question?

i am inclined to believe that you have simplified it wrong

consider the first half

all elements of A that are not in both B and C

wait

right, because the same overline is on both B and C

ok

i misunderstood this then

so either A is true and BC is false, or A is false and BC is true

[glacial trellis]

@fiery stream

<:HelpIcon:1304095958283321385>| Help Reminder

Hello removed014019312421321, this is a friendly reminder that your thread has been inactive for more than 24 hours. If you no longer need assistance, please consider closing the thread using the +close command.

[river tangle]

+close