Everyone seems to be speculating whether or not Coulson is dead. It seems to be pretty obvious that he'll come back as Vision.
But here's my question; why are people even unsure about Coulson being dead?
After he gets stabbed by Loki, and both Tony and he are in the STARK tower, after Tony is throw from the window and suits up mid-air and flies back up.. before he hits Loki he says "And you pissed one other person off. His name is Phil." Would this not assume he's still alive, and Tony knows it?