context: It is unlikely that Winona is a mouse. It is probably the case that Mary went to the office. It is impossible that Emily is a mouse. There is a better than even chance that if Emily is a mouse, or Winona is a mouse, then Greg is a frog. There is little chance that if either Winona is a mouse, or Emily is a mouse, then Sandra put down the milk. We doubt that if Winona is a mouse, and Emily is a mouse, then Julius is a rhino.
hypothesis: Chances are about even that either Emily is a mouse, or Sandra put down the milk.
valid_hypothesis: There is almost no chance that either Emily is a mouse, or Sandra put down the milk.
invalid_hypothesis: Chances are about even that either Emily is a mouse, or Sandra put down the milk.
hypothesis_assertion: Either Emily is a mouse, or Sandra put down the milk.