Read the following premise and answer if the hypothesis is true.
A man is walking along a brick wall with writing on it.
Hypothesis: The man is wondering who has done all the writing on the brick wall.. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
It's impossible to say
It's possible to say "Yes" if it's known that the man didn't write on the wall himself and didn't witness