Which one of the following could be the schedule for the conference?

Dane on July 25, 2020

Contrapositive of last rule

Hi, I just want to make sure I properly understood the last rule. I wrote the contrapositive of "If L is on Friday, then L is at 1pm" as "If L is at 2pm or 3pm, then L is on Thursday." This deduction helped me master the scenarios and deduce that L could not be at 1pm on Thursday. Is this correct?

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Ravi on July 25, 2020

@dpenn, yes, that's the correct way of writing the contrapositive. Great job—keep it up! Let us know if you have any other questions!