context: There is almost no chance that Gertrude is a mouse. There is a better than even chance that Lily is yellow. Chances are about even that Greg is a rhino. It is probable that if Gertrude is a mouse, and Greg is a rhino, then Brian is a swan. We believe that if Gertrude is a mouse, and Lily is yellow, then Julius is a frog. It is probably the case that if Lily is yellow, and Greg is a rhino, then Mary grabbed the milk.
hypothesis: It is improbable that lily is yellow, or Brian is a swan.
valid_hypothesis: There is a better than even chance that lily is yellow, or Brian is a swan.
invalid_hypothesis: It is improbable that lily is yellow, or Brian is a swan.
hypothesis_assertion: Lily is yellow, or Brian is a swan.