Is it legal that we attack or weaken the assumption of an argument?
Typically, in a "weaken" type question, the premise that is "attackable" is one the is "hidden" or "assumed", one that is clearly the opinion of someone, or one that is presented as a "hypothesis" or "theory" (i.e., "qualified" premises).
In my experience, any unqualified
premise that is given in the statement can be assumed to be TRUE and is immune from attack.
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993