context: Chances are slight that Julius is a swan. It is certain that Mary dropped the milk. It is highly likely that Greg is a frog.
hypothesis: It is highly likely that either Mary dropped the milk, or Greg is a frog.
valid_hypothesis: It is improbable that either Mary dropped the milk, or Greg is a frog.
invalid_hypothesis: It is highly likely that either Mary dropped the milk, or Greg is a frog.
hypothesis_assertion: Either Mary dropped the milk, or Greg is a frog.