Just because, the man is gritting his teeth does not mean it is because he is eating tough beef jerky.


Context: A man in a black sailor's uniform and white hat clenches his hands together and grits his teeth.
Hypothesis: A man in a black sailor's uniform and white hat clenches his hands together and grits his teeth because he is eating tough beef jerky.

Is the hypothesis incorrect? (Yes, no, or unknown)?