Winning with Topicality

Topicality exists to limit what the affirmative may talk about so the negative can have a reasonable chance to argue against the case.
The negative argues that topicality is a voting issue. In other words, they argue that the affirmative should lose the debate if the negative can prove that the affirmative plan does not support the resolution.
Topicality is a very powerful argument because the affirmative can lose the debate on topicality even if they are winning every other argument in the debate.
This argument is referred to the "jurisdiction". It means that the judge cannot vote for a non-topical plan because it is not in her jurisdiction.