The Blind Rebuttal
Answer a case you have never seen: your partner reads a contention from an unfamiliar brief and you give a structured response cold.
Your partner picks a contention from any brief you haven’t read (a past topic works well) and reads it aloud at speech pace while you flow.
You get 30 seconds of prep. Then give a two-minute response using the four-part structure: name it, attack the link, attack the impact, give a reason to prefer. You don’t need evidence; use analysis only.
This builds the skill that wins outrounds, which is coming up with responsive analysis when your blocks don’t apply. Notice which attack you reach for first. Strong debaters develop a default checklist (link, uniqueness, impact, turn) that they run against any argument.
Variations
The double stack
Your partner reads two contentions back to back, and you answer both in three minutes with clear signposting. This is close to the time pressure of a real second rebuttal.