Which one of the following could be an acceptable selection of the photographs to appear?

Gabriela on August 4, 2020

B V D

Is D wrong because if you have a F in sports you have to have a H in Lifestyle. Basically I am asking if the rule is biconditional - The number of H's photographs in L must be the same as the number of F in S . Is this the same as saying the number of F in S must be the same as the number of H In L? Thank you

Reply

Shunhe on August 5, 2020

Hi @Gabriela-Diaz,

Thanks for the question! Yes, the rule is biconditional here. Generally speaking, when we talk about “equality,” like X = Y (so here, the number of H’s photographs in L must be the same as the number of F’s photos in S can also be expressed, H’s photographs in L must be equal to F’s photos in S), it’s biconditional. And how would it be possible for X to be the same as Y, but Y to not be the same as X? Or vice versa? It wouldn’t be. And so the rule cuts both ways.

Hope this helps! Feel free to ask any other questions that you might have.