"If you get 180 on LSAT, [then] your chances of getting into T3 increase" is a material conditional of the form P-->Q. These conditionals are logically equivalent to (~P v Q) (that is, ‘not P or Q') by the material implication rule. The negation…
To say that a proposition P is a necessary condition for a proposition Q is to say that Q implies P (logically symbolized as follows: Q-->P).
To say that a proposition P is a sufficient condition for a proposition Q is to say that P implies Q (…