Wow, I did everything on this question and got sucked into answer choice E but had no idea to interpret the word "that" the way JY explained it. Are there others words that indicate "and" or sufficiency that are worth knowing?
http://classic.7sage.com/lsat_explanations/lsat-62-section-2-question-19/
just checking the everyone not = some do not yes?
and does whoever introduce a sufficient condition? it does, right?