context: It is likely that Bernhard is a swan. There is a better than even chance that John went to the kitchen. We believe that Jessica is a mouse. There is little chance that if either John went to the kitchen, or Bernhard is a swan, then Daniel got the milk. It is improbable that if John went to the kitchen, and Jessica is a mouse, then Lily is white. It is probably the case that if either Jessica is a mouse, or Bernhard is a swan, then Fred moved to the office.
hypothesis: Chances are about even that jessica is a mouse, and Bernhard is a swan.
valid_hypothesis: Chances are about even that jessica is a mouse, and Bernhard is a swan.
invalid_hypothesis: There is almost no chance that jessica is a mouse, and Bernhard is a swan.
hypothesis_assertion: Jessica is a mouse, and Bernhard is a swan.