... the need for an unstated assumption for the argument's sub ... activity is undoubtedly a fundamental assumptionnecessary to connect the claim to ...
"Sufficient" and "necessary" conditions refer to the antecedent ... when true, is by itself sufficient to guarantee the truth of ...
So, we have our sufficient condition, "born in the 50s ... happens when we deny the sufficient condition:
Conditional and Set Logic is still very relevant and important for LR. Understanding your Sufficient and Necessary conditions like on MBT questions is one example I can think of for LR.
... doesn't really introduce a sufficient or necessary condition in a way ... what you identified as the sufficient and necessary conditions in the stimulus ...