context: It is highly likely that Mary went to the office. It is probably the case that Emily is a wolf. It is highly unlikely that Greg is a rhino. Chances are about even that if Greg is a rhino, or Mary went to the office, then Fred is in the kitchen. It is highly likely that if Mary went to the office, and Greg is a rhino, then Julius is a swan. It is probably not the case that if either Greg is a rhino, or Emily is a wolf, then John left the milk.
hypothesis: We doubt that either Greg is a rhino, or Emily is a wolf.
valid_hypothesis: It is probable that either Greg is a rhino, or Emily is a wolf.
invalid_hypothesis: We doubt that either Greg is a rhino, or Emily is a wolf.
hypothesis_assertion: Either Greg is a rhino, or Emily is a wolf.