context: It is probable that Greg is a rhino. There is little chance that John moved to the garden. Chances are slight that Brian is a lion. We believe that if Brian is a lion, and John moved to the garden, then Mary went to the office. It is probable that if Brian is a lion, or Greg is a rhino, then Bernhard is a frog. It is highly unlikely that if John moved to the garden, and Greg is a rhino, then Lily is a swan.
hypothesis: It is probably the case that either Greg is a rhino, or Mary went to the office.
valid_hypothesis: It is probably the case that either Greg is a rhino, or Mary went to the office.
invalid_hypothesis: It is highly unlikely that either Greg is a rhino, or Mary went to the office.
hypothesis_assertion: Either Greg is a rhino, or Mary went to the office.