Let us talk something about the assumptions in critical reasoning.
Assumptions in the CR section are always going to be tough. Mainly because GMAC doesn't specifically tell us what to assume and what not to. So as a start (and as per GMAT Powerscore CR
Bible), we should start a very important point:1-GMAT is based on "common sense" meaning that "in general", we can assume things that would be considered common sense or widely known to the general public.
2-But in GMAT you can make some assumptions and not others.
3-An idea that is generally not seen in everyday life should only be assumed if explicitly written in the CR question.
Let us build on this topic so that we can have reach a clarity about Assumptions.