context: It is highly likely that Greg is gray. There is little chance that Mary went to the kitchen. Chances are slight that John left the apple. It is highly likely that if Greg is gray, and John left the apple, then Bernhard is a frog. It is certain that if Greg is gray, or Mary went to the kitchen, then Sandra put down the milk. It is probable that if either Mary went to the kitchen, or Greg is gray, then Lily is a rhino.
hypothesis: It is highly likely that greg is gray, or Sandra put down the milk.
valid_hypothesis: It is highly likely that greg is gray, or Sandra put down the milk.
invalid_hypothesis: Chances are slight that greg is gray, or Sandra put down the milk.
hypothesis_assertion: Greg is gray, or Sandra put down the milk.