context: There is almost no chance that Emily is a sheep. It is improbable that Bill moved to the garden. It is improbable that Julius is a frog. It is almost certain that if Bill moved to the garden, and Emily is a sheep, then Greg is green. We doubt that if Julius is a frog, and Emily is a sheep, then Daniel grabbed the milk. Chances are about even that if either Emily is a sheep, or Julius is a frog, then Fred dropped the apple.
hypothesis: It is probably the case that fred dropped the apple, and Emily is a sheep.
valid_hypothesis: It is impossible that fred dropped the apple, and Emily is a sheep.
invalid_hypothesis: It is probably the case that fred dropped the apple, and Emily is a sheep.
hypothesis_assertion: Fred dropped the apple, and Emily is a sheep.