@CollinEsquirol This is what I got hung up on as well. I guess it's a reasonable assumption that dragons are creatures in this situation?

Might be worth acknowledging an important nuance in your logic and explanation.

"You can go to law school only if you have a bachelor's degree"

Can go Law school > Have Bachelors

Actually leaves the possibility open to attending law school with JUST a bachelors. It is not guaranteed, but it is a possibility. In the world of your claim, it could be true that you get to go to law school with just a BS. It is not sufficient, which means it is not guaranteed, but it's possible, regardless of the added detail in your explanation. Your claim has nothing to do with all the other needs we know are required for law school.

Remember! A claim that meets the necessary condition (Kumar late) does NOT guarantee the sufficient condition (citation). It only creates the possibility for the sufficient condition to trigger. "COULD BE TRUE"

Kumar late? The teacher now has the option to cite, but may choose not to. Kumar not late? Teach does not have the option to cite at all.

You can actually visualize this one with circles. Citation smaller circle within late. When Kumar arrives late, he's necessarily inside the late circle but could be anywhere inside the circle. He could be in a different subset that says "gets pizza." Or he could be in the circle of citation.

I've struggled with sufficiency for some reason, so wrote out a couple things that helped -

Being in subset is sufficient for membership in superset.

• If in subset, guaranteed in superset.

• If in subset, must be in superset.

• If in subset, necessarily in superset.

Being in superset is not sufficient for membership in subset.

• If in superset, not guaranteed to be in subset.

• If in superset, could be in subset.

• If in superset, not necessarily in subset.

Sufficiency is like - is this information sufficient for me to believe another thing.

• Claim: Jane lives in New York. Is that sufficient for me to assume she lives in the US? Yes it is sufficient.

• Claim: Jane lives in the US. Is that sufficient for me to assume she lives in New York? No, it is not sufficient.

Claiming Jane lives in New York so she must live in US is valid. Must be true.

Claiming Jane lives in US so she must live in New York is not valid. Could be true.

wow. i spent about 7min trying to diagram this thing for good practice, but couldn't get it right. then just read through the ACs. A and B I couldn't really make sense of, then C was like "duh pick me" so I did. Didn't even glance at D/E. Not sure if practicing basics is helping or hurting me lol

Feedback on this lesson - I pretty much always watch the video before reading the text, but in this case the answers to the practice were spoiled for me by the video. Might be nice to separate the practice from the main lesson video, or put the video at the end in this case.