context: It is impossible that Lily is a frog. Chances are slight that Daniel put down the milk. It is probably the case that Greg is gray. Chances are about even that if Greg is gray, and Lily is a frog, then Emily is a sheep. Chances are slight that if either Greg is gray, or Lily is a frog, then John got the football. It is unlikely that if Greg is gray, or Daniel put down the milk, then Bill went to the kitchen.
hypothesis: It is certain that emily is a sheep, or Daniel put down the milk.
valid_hypothesis: Chances are slight that emily is a sheep, or Daniel put down the milk.
invalid_hypothesis: It is certain that emily is a sheep, or Daniel put down the milk.
hypothesis_assertion: Emily is a sheep, or Daniel put down the milk.