Why does she keep placing p and M together when they cannot both be in the group? Or am I mistaken

Can someone answer this?

Someone please answer this question.

Hi, I think I can help with your question. The rule states that P and M cannot both be selected. It does not say that they can't both NOT be selected. I was really confused about this rule for a while, and this is the only answer I could come up with.

I'm confused because I thought that when a rule says they can't be both selected, they shouldn't be in the same section? Since it would be: M--> /P P--> /M right?

I also have the question about G and K. Are they not contrapositive of each other? Like: G--> K /K-->/G