I'll try and explain my thinking.
I was clarifying that it doesn't matter if the flinch occurred in fair/foul territory.
So it seems he's applying a standard (if she's in fair) that doesn't matter or exist. A flinch to me is moving my head quickly at a backstop on a foul ball.
There can a pretty big gap between a flinch, and attempting to run to 2B.
He saw a flinch as an attempt,good enough for me. I see a flinch as a minor movement of the head, elbow, or other body part. I see an attempt along the lines of a step towards 2B.
Confused now ? I am.