Support/Contrast Question from #7 on pg. 122 of the GRE Big Book

I understand that the support in this sentence is so…that, but I am confused as to why the blank would be a positive word.

i.e. of idea 1 [considered… dangerous] is bad and “so…that” is meant to support that, then shouldn’t idea 2 [he criticized….so ____.] also be negative? Therefore, the blank should be negative?

Agreed. Let’s assign it a ( - ).

Agreed, so let’s assign this ( = )

Yes. So let’s assign “criticize” with ( - ) which means Blank must be positive so that the overall Idea will be negative.

No. The blank must be positive so that

[Criticize] x [Blank] = Negative

[ Negative] x [Blank] = Negative

[Negative] x [Positive Blank] = Negative.

That is why the blank by itself must be positve