context: Chances are slight that Greg is gray. It is likely that Mary picked up the milk. We doubt that Julie is in the kitchen. We doubt that if either Julie is in the kitchen, or Mary picked up the milk, then Antoine is hungry. It is highly unlikely that if Julie is in the kitchen, or Greg is gray, then John moved to the garden. It is probable that if Greg is gray, and Julie is in the kitchen, then Julius is white.
hypothesis: It is probably the case that either Julius is white, or Mary picked up the milk.
valid_hypothesis: It is probably the case that either Julius is white, or Mary picked up the milk.
invalid_hypothesis: It is highly unlikely that either Julius is white, or Mary picked up the milk.
hypothesis_assertion: Either Julius is white, or Mary picked up the milk.