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Daily Drills 38 - Section 38 - Question 4

P: A → not BP: not C → BP: ?C: not D → not A

sharpen7 July 16, 2017

Help

I don't understand how to do this question.

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Mehran July 18, 2017

@sharpen7 you can view the explanations for the daily drills after you complete them.

Just access your drill history from the left menu by selecting "Daily Drills."

P: A ==> not B
B ==> not A

P: not C ==> B
not B ==> C

P: C ==> D
not D ==> not C

C: not D ==> not A
A ==> D

The transitive property is as follows:

not D ==> not C ==> B ==> not A
A ==> not B ==> C ==> D

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