Hey!
I have previously written a few posts on negotiations, so I have quoted those below!
If it is a more debate-style exercise, I would say that the biggest thing to focus on is progressing the discussion, not just arguing your point.
Therefore, I'd try to frame your contributions around evaluating points (e.g. weighing pros and cons, discussing risk, and practicality) rather than just saying what you think. It helps to keep linking back to the objective (e.g. "which option best meets X?" as that shows that you are focused on the question, and have commercial awareness.
I'd also make sure that you engage direction with others. This could look like building on strong points, challenging ideas (respectfully!) and helping to move things forward if the conversation is getting stuck (e.g. suggesting that you narrow down to fewer options or summarise where you are).
Essentially, they'll be looking for someone who can think critically and help the group reach a sensible outcome, rather than someone who just debates for the sake of it.
Best of luck with the AC tomorrow!!
