context: It is likely that John dropped the apple. It is almost certain that Brian is a lion. It is certain that Emily is a mouse. There is a very good chance that if either Emily is a mouse, or Brian is a lion, then Lily is a frog. There is a better than even chance that if John dropped the apple, or Emily is a mouse, then Mary moved to the garden. It is improbable that if either Brian is a lion, or John dropped the apple, then Greg is green.
hypothesis: Chances are about even that either Mary moved to the garden, or Brian is a lion.
valid_hypothesis: Chances are about even that either Mary moved to the garden, or Brian is a lion.
invalid_hypothesis: It is impossible that either Mary moved to the garden, or Brian is a lion.
hypothesis_assertion: Either Mary moved to the garden, or Brian is a lion.