Hey lsat,
Let me jump in here too and see if I can clear things up.
First, and this is happy news, I don't think diagrams are even necessary here. If you look at my explanation on the prior page you'll see that I (and others) walked through the logic in this question without having to sketch anything out--a relief to nearly anyone who finds overly-formalized logic a chore
The reason we show some diagrams above is to try to really illustrate the underlying mechanics of what's occurring between sentence 1 and sentence 2, and while that's sometimes a necessary device for walking people through it, I don't think it's an optimal approach to efficiently choosing answer choice (A) in this case. Instead, and if you read my last comment on this question you'll see this in more detail, if you can just recognize that the conclusion contains a new term, "intelligence," note that this is then a Supporter Assumption, and tie that new term back to the premise about complex, goal-oriented behavior, you're done! (A) is the only answer that shows a connection between complex, goal-oriented behavior and general intelligence (not just "intelligent human
behavior" like in E), so it's immediately correct. Piece of cake!
But since your question is about diagramming, let me address that more directly as well.
Another reason I wouldn't diagram is because these sentences don't really exhibit traditional conditional reasoning, and thus evade clear diagramming. It seems to me that that's where you're getting hung up. That is, a statement like "No A without B" is easy to put together: A
B.
But when you get into the realm of mere possibilities with words like "
can exhibit" then suddenly strict diagramming based on general conditional guidelines becomes trickier (and, honestly, a whole lot less valuable). If it was "cannot exhibit," or "always exhibit," then you'd be in better shape, but this is just way too soft for a hard-case arrow (
).
Consider the first sentence stated in a synonymous, but maybe easier to understand way:
"Some humans' complex, goal-oriented behavior may not necessarily be done consciously."
Is that the sort of thing you'd diagram? Not me. It's too soft, repeatedly.
Really it's telling you that something is NOT a necessary condition—conscious awareness isn't required—meaning there may not be a relationship to even show! [bold to emphasize that this is arguably all you need to realize to see why diagrams fail us here]
Instead, the first sentence tells us two things, let's call them A and C, aren't connected, and the conclusion tells us that means another thing, let's call it B, isn't connected to C either. How can we prove that B and C aren't connected just because A and C aren't connected? Show that A and B
are connected: A
B . That's all that happens here.
The takeaway then is be careful with trying to make things more mechanical, more absolute, than they really are. It's an extremely common mentality to fall into, and this is a test that'll repeatedly make you pay for it.
I hope that helps!