As it is presented in the passage, the approach to history taken by mainstream U.S. historians of the late nineteenth...

DPorter on September 21, 2021

Question 4

I am confused when Jones is not automatically first when J is in second. How can jones be 4th? When finding the contrapositive are they not reversal?

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Emil-Kunkin on August 8, 2023

Hi, the rule is that if J is in 1 then H is in 2. The contrapositive is if h isn't in 2 the j isn't in one. We must both negate and reverse, not just one.