Read the following premise and answer if the hypothesis is true.
I ducked so fast I wasn't sure whether he 'd seen me or not, but it gave me a prickly feeling just to imagine it, so I scuttled for the door and legged it up the spiral stairway three steps at a time, just in case. As I ran, I remember thinking stupid thoughts like. How did he know I was up here looking down?
Hypothesis: he was up there looking down. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
Yes
It's impossible to say.