Your answer is rationally correct.
I'm a procrastinator. I have great empathy for people who say, “You know what? I'll let sleeping dogs lie, because the cost of the wrong answer is so high.” So I think you need to encourage those people to come forward in such a way that we're not going to drop them on their head if they get the wrong answer, and to maybe communicate some of the challenges they may face down the road if they don't clarify this at this point.