For strengthening questions, how much does it need to strengthen the stimulus for it to be correct. For example, weakening questions, as long as it casts doubt on the support, I can weaken the argument. Does this also apply for strengthening questions?
So for necessary assumptions, the assumptions can be about the context, premise and conclusion? If the negation a statement attacks, say, the context of an argument, would this statement be a necessary assumption? Am I understanding this right??