Union member: Some members of our labor union are calling for an immediate strike.
Conclusion
We must not strike now.
Evidence
A strike would cut into our strike fund and would lead to a steep fine, which would be a major financial loss.
Evaluate
Okay, no famous flaws stick out. Let's just try to debate this guy: GIVEN THAT the strike fund would cut into our strike fund / lead to a steep fine, HOW CAN WE STILL ARGUE that we should strike now?
We could say,
We might also say,
Goal
Basically, it seems like we need some answer that allows us to argue that the strike could still be worth it, because a negative isn't really a negative (cutting into the strike fund is fine — it's for strikes), or because a negative could be outweighed by a positive (what we would gain from a strike might be more than what the fine costs).