If Shigeru plays golf, then each of the following are pairs of people who must play the same sport as each other EXCEPT:

sarahanthony February 23, 2020

Why are we assuming Maricella plays golf because Shigeru plays golf.

The passage says "if Maricella plays golf, then Paulo and Shigeru plays golf". Not the other way around

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Skylar February 23, 2020

@sarahanthony, happy to help.

Rule #4 says: "If Maricella plays tennis, then Shigeru plays tennis."
We can diagram this as: M(t) -> S(t)
The contrapositive of this is S(g) -> M(g). This allows us to deduce that Maricella has to play golf if Shigeru plays golf, which is the case in this question.

Does that make sense? Please let us know if you have any other questions!

sarahanthony February 24, 2020

Yes, that helps. Thank you

Lib September 30, 2020

I have the same question as mentioned above, but I am still not understanding how
S(g)-> M(g) is the contrapositive of M(t) -> S(t)... ?

Please explain!?

NayeliLeal June 26, 2023

If M is playing tennis, then s must also play tennis. The question stem says S is playing golf, therefore according to the rules s CANNOT be playing tennis, or else you'd be breaking rule #4.