No, I said, "Photos only show a fraction of a second of time. You're allowing yourself to be fooled by the illusion of a still image making you think that what is seen happened for an extended period of time."
It depends on the photo. Technically, you can never prove that someone is sleeping in a photo, as even if someone is laying down with their eyes shut, they might still be awake.
Anything where someone tries to claim the photo shows more than it does, like you did.
A photo only shows what is happening for the fraction of a second that the photo has captured.
You can try it yourself. Watch a video of someone talking and pause it, advance frame by frame and you will see their face contort into all kinds of bizarre shapes and expressions.
The photo you claim shows Trump sleeping would probably not prove to a court that he was sleeping.