context: It is probably the case that Brian is a swan. It is probably the case that Bernhard is a frog. It is certain that Bill is in the school. We doubt that if Bernhard is a frog, and Bill is in the school, then Daniel took the football. It is improbable that if Bernhard is a frog, and Brian is a swan, then Julius is green. There is a better than even chance that if either Bernhard is a frog, or Brian is a swan, then John got the apple.
hypothesis: We believe that daniel took the football, or Brian is a swan.
valid_hypothesis: We believe that daniel took the football, or Brian is a swan.
invalid_hypothesis: There is little chance that daniel took the football, or Brian is a swan.
hypothesis_assertion: Daniel took the football, or Brian is a swan.