First legislator: Medical research is predominantly done on groups of patients that include only men.
First L's Conclusion
Govt-sponsored medical research should have to include studies of women.
Second L's Objection
(No they shouldn't). Considerations of male/female balance are inappropriate in medical research, and they have no place in science.
Evaluate
Since we're trying to logically counter the 2nd person, we want to defend the 1st person's idea while responding to the 2nd person's.
It sounds like the second person is saying that science is sex-blind, but is it? Didn't science figure out that males have Y-chromosomes and females don't? Aren't there scientific differences between the sexes that make it scientifically relevant whether we're testing males vs. females?
Goal
Let's find an answer that allows us to argue that having some research done on women IS appropriate. It does have a place in science. Doing research only on men is worse.