context: It is probably the case that Lily is a swan. We believe that Greg is yellow. It is improbable that Bill went to the kitchen. There is almost no chance that if Greg is yellow, and Lily is a swan, then Winona is a mouse. Chances are slight that if Greg is yellow, and Lily is a swan, then John put down the apple. It is likely that if Lily is a swan, or Bill went to the kitchen, then Julius is a rhino.
hypothesis: Chances are about even that winona is a mouse, and Lily is a swan.
valid_hypothesis: There is almost no chance that winona is a mouse, and Lily is a swan.
invalid_hypothesis: Chances are about even that winona is a mouse, and Lily is a swan.
hypothesis_assertion: Winona is a mouse, and Lily is a swan.