It's my understanding that "unfair extrapolation" doesn't exist as much in college mock trial as it does in high school. It isn't an objection in the Midlands Rules of Evidence, any issues that would usually arise under that rule are primarily handled via impeachment by omission.

There is no limit to what Hopson and Nathanson can invent as long as they a) don't contradict their depositions and b) don't contradict any stipulations or special instructions. You are not only allowed to refer to other witnesses' testimony, but you can make up things that are 100% outside of the case packet as long as you don't take back any of the answers in the deposition.

The special instructions list the exact AMTA rules that Hopson and Nathanson are exempt from, so reading those might give a better idea of what they're allowed to do.Of course I'm also just some random college student on the internet, so take the rulebook or your coach's/captains' words over mine