bench mark boundary condition cardinal point catch chief thing clause climax condition core cornerstone crisis critical point crux donnee escalator clause escape clause escape hatch essence essential essential matter fine print fundamental gist given gravamen great point grounds heart high point important thing issue joker kernel keystone kicker landmark limiting condition main point main thing material point meat milestone must necessity nub obligation parameter pith pivot prerequisite provision provisions proviso real issue requirement requisite salient point saving clause small print specification stipulation string substance substantive point terms the bottom line the point turning point ultimatum whereas