Read the following premise and answer if the hypothesis is true.
Measure<br>John wanted to know how dogs could find electronic devices. He set up a test to measure the chemicals off-gassed by plastic. John used a sensitive device that could detect odors. He found plastic devices gave off a certain chemical as they decayed. John published his research in an esteemed science journal.
Hypothesis: John used stray dogs for his tests. 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.