According to the professor, Yousef's theory about dating is not strong because it is not falsifiable, by which he meant that it is impossible to determine whether Yousef's theory is supported by data.
Dating is the stage of a relationship where two people interact with one another, usually to assess each other's appropriateness as a partner in a future intimate relationship.
When it is possible to imagine an experimental finding that contradicts a hypothesis or model, it is said to be falsifiable. That is, one of the intended experiment's outcomes must be a result that, if found, will contradict the hypothesis.
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