context: Chances are about even that Greg is a swan. It is probable that Mary went to the office. Chances are slight that John moved to the garden.
hypothesis: Chances are slight that either John moved to the garden, or Mary went to the office.
valid_hypothesis: It is likely that either John moved to the garden, or Mary went to the office.
invalid_hypothesis: Chances are slight that either John moved to the garden, or Mary went to the office.
hypothesis_assertion: Either John moved to the garden, or Mary went to the office.