Does this answer choice not commit a "neglecting the middle ground" flaw?

The contrapositive of the 3rd statement is not WDPP-->comfortable. It WDPP--> not uncomfortable

Hi, while I think the passage is implicitly defining all spaces as either comfortable or uncomfortable, I don't think that's an issue for the right answer choice. We know that all well designed spaces are spacious, and so that all well designed restaurants are spacious. I agree it feels a bit weird that the passage doesn't eliminate the possibility of a middle ground, but for a must be true this is much less of an issue.

Ok thank you Emil