Only computer scientists understand the architecture of personal computers, and only those who understand the archite...

After struggling for several minutes to correctly interpret the conclusion for this question, I was surprised that very few people were talking about the difficulty in determing the sufficient and necessary clause in the sentence: "It follows that only those who appreciate these advances are computer scientists." The important part of the sentence is as follows: "only those who appreciate these advances are computer scientists" which seems to mean "The only people who appreciate these advances are computer scientists" or "Computer scientists are the only people who appreciate these advances" For some reason, I found distinguishing this S from N really confusing. Still, it's taught me something valuable about how to view the sentences - don't use everyday understanding to interpret a sentence. I think that this is the correct way to interpret it: Only A are B: (B --> A) "only [those who appreciate these advances] are [computer scientists]" [computer scientists] --> [those who appreciate these advances] The only A are B: "The only [people who appreciate these advances] are [computer scientists]" [people who appreciate these advances] --> [computer scientists] A are the only B: "[Computer scientists] are the only [people who appreciate these advances]" [people who appreciate these advances] --> [computer scientists] Please correct me if I'm mistaken in any with this.