context: It is unlikely that Brian is a frog. We believe that Mary went to the kitchen. It is unlikely that Julius is white. It is probable that if Brian is a frog, and Julius is white, then Bernhard is a swan. There is almost no chance that if Brian is a frog, and Mary went to the kitchen, then Lily is white. There is almost no chance that if either Mary went to the kitchen, or Brian is a frog, then John put down the apple.
hypothesis: It is almost certain that either Bernhard is a swan, or Julius is white.
valid_hypothesis: We doubt that either Bernhard is a swan, or Julius is white.
invalid_hypothesis: It is almost certain that either Bernhard is a swan, or Julius is white.
hypothesis_assertion: Either Bernhard is a swan, or Julius is white.