context: There is almost no chance that Brian is a swan. Chances are about even that Emily is a sheep. There is little chance that John went to the bedroom. We doubt that if either Brian is a swan, or Emily is a sheep, then Daniel is in the garden. It is impossible that if either Emily is a sheep, or Brian is a swan, then Mary took the apple. It is almost certain that if either Emily is a sheep, or John went to the bedroom, then Lily is green.
hypothesis: We believe that brian is a swan, or Daniel is in the garden.
valid_hypothesis: Chances are slight that brian is a swan, or Daniel is in the garden.
invalid_hypothesis: We believe that brian is a swan, or Daniel is in the garden.
hypothesis_assertion: Brian is a swan, or Daniel is in the garden.