Premise: "A man with a young boy sitting by the water reads a paper."\nHypothesis: "The man is with his son."\nDo we know that the hypothesis entailed by the premise?
Let's think step by step.
it is not possible to tell
Sentence 1: A man with a young boy sitting by the water reads a paper.

Sentence 2: The man is with his son.

.

So, the final answer is it is not possible to tell