I find myself asking people what they are doing today or tomorrow a lot and what time they are doing it. Or "What time will you be back?", to the point where people have asked me if I'd like them to make a schedule for me before. And of course I say yes. It kind of frustrates me when they have no idea, or they just say "later", so I find myself trying to guess at least. I always like to have an idea, at least, or a projected time. I like to time estimate. Also, when I'm going somewhere, I like to know what the game plan is. What time are we leaving. What are we doing, and when we can expect to be back. I don't like to just get in the car and go. Some people seem ok with just winging things like that or not having a projected time.
So is this rationality? Something else? What IE's are at work here?