An elderly man could have hair of any color, or no hair at all, it cannot be inferred that his hair is gray; similarly, a man can ride a bike down the street and be alone, be with someone or with a group, it cannot be assumed what this particular situation is.


Context: An elderly man in a gray jacket is riding his bike down the street.
Hypothesis: An old man with gray hair in a gray jacket is riding a bike alone.

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