context: Chances are slight that Julius is a swan. Chances are about even that Bill moved to the garden. Chances are about even that Sandra grabbed the apple.
hypothesis: Chances are about even that either Sandra grabbed the apple, or Bill moved to the garden.
valid_hypothesis: Chances are about even that either Sandra grabbed the apple, or Bill moved to the garden.
invalid_hypothesis: There is almost no chance that either Sandra grabbed the apple, or Bill moved to the garden.
hypothesis_assertion: Either Sandra grabbed the apple, or Bill moved to the garden.