I'm gonna be sick.
- What?
- I think I'm gonna be sick.
- How sure?
- High 90s.
- Yeah. We got her.
- Okay.
I should take her home.
Yeah. Probably a good idea. 見於《The Longest Ride》10：13／2：08：19
【how sure】
asks about the actual degree of certainty (and not the reason behind it)