context: It is unlikely that Greg is a frog. There is almost no chance that Brian is gray. It is certain that Sandra dropped the milk. It is probably the case that if Brian is gray, and Greg is a frog, then Julius is a lion. It is unlikely that if Greg is a frog, and Brian is gray, then Jessica is a sheep. It is probably the case that if Greg is a frog, and Sandra dropped the milk, then Mary went to the kitchen.
hypothesis: It is certain that greg is a frog, or Sandra dropped the milk.
valid_hypothesis: It is certain that greg is a frog, or Sandra dropped the milk.
invalid_hypothesis: There is little chance that greg is a frog, or Sandra dropped the milk.
hypothesis_assertion: Greg is a frog, or Sandra dropped the milk.