Why do people ask vague questions?  Why do people get angry when you try to fully answer very broad question they ask?

About a week ago my parents went out and bought new phones, my dad ended up with the Incredible.  Well today he tells me he’s thinking about returning his phone and getting the Droid X.  It’s his money and he can do what he wants with it.  I would prefer the droid x, but whatever..  So, he starts asking me questions about the Droid X, which I try to answer as completely as possibly.

He then asked me, “Is it the same screen.”

Naturally I started off with, “No, it’s bigger and a little brighter…”  I only got about that far before he interrupted with,

“I already know everything about the screen, I want to know if it’s the same screen.”

… It’s about this point I loose my mind…  I look like I just got a lobotomy, I’m drooling and my eyes start to cross a little..

And then of course, again I’m the idiot.