Leo: Premise: "A man with a black hat is standing and shading his eyes."
Hypothesis: "A man is standing out in the hot sun."
Do we know that the hypothesis entailed by the premise?
Mei: OK, So, let's think first...
Me:
The man is shading his eyes and that does not necessarily mean that he is in the hot sun.
Thus, the answer is it is not possible to tell.