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

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.