question 5 confused me. im not supposed to assume..and then I am?

This one is more confusing to me than Group 3. For Negate Necessary, are both statements (ADP → /A and A → /ADP) correct? Versus Negate Sufficient, where only one is correct?

@ShanR I should just focus on the word "every" more.

#2 is confusing me, because of the word impacts. My thinking was in order for the society to be endangered, impacts from space must happen.

@DouglasNeumeyer thank you for this explanation, I was confused as well

I guess a part of me feel likes Q2 could be switched around....but is it more of a "if, then" statement thing?