context: It is certain that John moved to the office. It is probably the case that Bernhard is a swan. There is little chance that Daniel took the football. Chances are about even that if Daniel took the football, and Bernhard is a swan, then Greg is yellow. It is certain that if John moved to the office, or Daniel took the football, then Mary went to the garden. It is probable that if either Bernhard is a swan, or John moved to the office, then Julius is white.
hypothesis: There is a very good chance that either John moved to the office, or Mary went to the garden.
valid_hypothesis: It is impossible that either John moved to the office, or Mary went to the garden.
invalid_hypothesis: There is a very good chance that either John moved to the office, or Mary went to the garden.
hypothesis_assertion: Either John moved to the office, or Mary went to the garden.