context: It is probable that Brian is gray. It is likely that Lily is a frog. It is highly likely that John put down the apple. It is improbable that if Lily is a frog, and John put down the apple, then Greg is a rhino. There is a better than even chance that if Brian is gray, and Lily is a frog, then Mary moved to the garden. It is probably the case that if Lily is a frog, and Brian is gray, then Jeff went to the kitchen.
hypothesis: There is a very good chance that either Greg is a rhino, or Jeff went to the kitchen.
valid_hypothesis: It is probably not the case that either Greg is a rhino, or Jeff went to the kitchen.
invalid_hypothesis: There is a very good chance that either Greg is a rhino, or Jeff went to the kitchen.
hypothesis_assertion: Either Greg is a rhino, or Jeff went to the kitchen.