context: It is unlikely that John is in the hallway. Chances are slight that Daniel grabbed the milk. Chances are about even that Sandra got the football. It is highly likely that if either Sandra got the football, or John is in the hallway, then Mary went to the kitchen. It is probable that if Sandra got the football, or Daniel grabbed the milk, then Emily is a sheep. It is almost certain that if either Sandra got the football, or John is in the hallway, then Greg is green.
hypothesis: It is highly unlikely that mary went to the kitchen, or Emily is a sheep.
valid_hypothesis: There is a better than even chance that mary went to the kitchen, or Emily is a sheep.
invalid_hypothesis: It is highly unlikely that mary went to the kitchen, or Emily is a sheep.
hypothesis_assertion: Mary went to the kitchen, or Emily is a sheep.