I really dont understand why for #3 we used the group 1 rule but not the group 2 rule since the statement had both "any" and "must"

Just to confirm, the formula is always: Sufficient condition → Necessary condition

Meaning, the sufficient is always on the left and necessary on the right?

Sometimes i get the order wrong like which goes on the left of the arrow and which goes on the right. Are there any tricks or tips you guys have to remember the order? Thank you

So for some reason, on the previous lesson i got all of the answers right. On this one however, everything was backwards & i do not know how to avoid that

For question 4, im having a hard time how its not /I since it says no invite...