The solution to the problem was considered ingenious. no one else had been clever enough to figure it out.

in the sentence above, which of the following strategies would be most effective to determine the meaning of "ingenious"?
reread the sentence.
use a dictionary or thesaurus.
look for a synonym in the sentence.
locate a signal word and antonym.

Refute it, showing why it is mistaken—an apparent but not real problem; acknowledge its validity or plausibility, but suggest why on balance it's relatively less important or less likely than what you propose, and thus doesn't overturn it; concede its force and complicate your idea accordingly—restate your thesis in a more exact, qualified, or nuanced way that takes account of the objection, or start a new section in which you consider your topic in light of it. this will work if the counterargument concerns only an aspect of your argument; if it undermines your whole case, you need a new thesis.