shresthpaul wrote:
Thanks for the response sayantanc2k! The addition of 'only' will definitely change things a lot. But tell me, don't you think option D could've been better stated as "The only factor relevant to measuring the EFFICIENCY of manufacturing equipment is NOT the productivity of such equipment."? Don't you think the objection raised i.e. "Does higher productivity imply higher efficiency? What if the quality of all the foam concrete produced by this equipment is inferior?" hints more at how the definition of efficiency stands incomplete if it were to only rest on productivity?
I would again use the negation technique:
If the advertisement challenges the truthfulness of a statement, it would support the negative of the statement.
The statement you have written is (say S1): "The only factor relevant to measuring the EFFICIENCY of manufacturing equipment is NOT the productivity of such equipment."
Negative of the above (say S2: "The only factor relevant to measuring the EFFICIENCY of manufacturing equipment is
NOT the productivity of such equipment."
If the advertisement challenges S1, it would support S2. But does the advertisement support S2? No, rather the advertisement opposes S2.
Thus to say in other way, the advertisement supports statement S1 (your statement) - it does not challenge S1.
Do you see my reasoning?