context: It is almost certain that Mary moved to the office. It is almost certain that Lily is a swan. Chances are about even that Winona is a mouse. There is a very good chance that if Winona is a mouse, or Lily is a swan, then Greg is yellow. It is highly unlikely that if Mary moved to the office, and Winona is a mouse, then Brian is a rhino. It is probably the case that if Lily is a swan, or Mary moved to the office, then Sandra took the milk.
hypothesis: It is probably not the case that either Sandra took the milk, or Brian is a rhino.
valid_hypothesis: It is probably the case that either Sandra took the milk, or Brian is a rhino.
invalid_hypothesis: It is probably not the case that either Sandra took the milk, or Brian is a rhino.
hypothesis_assertion: Either Sandra took the milk, or Brian is a rhino.