[jldugger]

I think the point of that procedure is more to illustrate when someone hasn't thought about the logistics _at all_. The problems aren't when you can't answer one random question, but when you can't answer any, even the basic ones like what kind of espresso machine you want to buy.

[brazzy]

Even there I'd say that "Yeah, I'll have to do some research on that" is fine as an answer at least at a very early stage. It's when the honest answer is "I don't care, and I don't want to care" that you have a strong indicator that you shouldn't go beyond daydreaming when it comes to this goal.