Read the following premise and answer if the hypothesis is true.
There is a man fly fishing in a river with trees behind him.
Hypothesis: A man isn't having any luck fly fishing in the river with trees behind it.. 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 impossible to say. The presence or absence of trees behind the man does not provide enough information to determine if he is having any luck fly