Just because a young male who appears to be in his late 20's or early 30's is smiling while about to bite into a sandwich does not mean it is a roast beef sandwich.


Context: A young male who appears to be in his late 20's or early 30's is smiling while about to bite into a sandwich.
Hypothesis: The man is eating a roast beef sandwich.

Given this context, determine if the hypothesis is true (Yes, no, or unknown)?