context: It is certain that John moved to the office. It is likely that Bernhard is yellow. It is probably the case that Emily is a mouse. Chances are about even that if Emily is a mouse, or John moved to the office, then Julius is a rhino. It is highly likely that if Emily is a mouse, or John moved to the office, then Winona is a cat. It is unlikely that if either Emily is a mouse, or Bernhard is yellow, then Brian is a lion.
hypothesis: It is probable that brian is a lion, and Winona is a cat.
valid_hypothesis: Chances are slight that brian is a lion, and Winona is a cat.
invalid_hypothesis: It is probable that brian is a lion, and Winona is a cat.
hypothesis_assertion: Brian is a lion, and Winona is a cat.