On the LSAT, if it asks you to pick the choice that weakens the argument most, does it have to be true and realistic? Or just weaken the argument? For example: If an answer choice for the tiger argument is "Tiger's are not mammals" that weakens the argument most but it's not true. Would that still be the right answer?

Can you not say desiring "it" could be referring to loosing of the wind? Does it always have to refer to just a noun? Im confused on why it's not plausible to substitute it with the word loosing as well as wind.

How come on question 3, the sentence begins with The only, but it is not used as a necessary condition?

How do you know which one is the subset and which is the superset? For example the "If one is a turtle, then one is a ninja." How would you know to make the ninja the superset?