context: There is almost no chance that Greg is a rhino. It is highly likely that Winona is a cat. There is almost no chance that Mary went to the office. There is a very good chance that if either Greg is a rhino, or Mary went to the office, then Julius is a lion. It is likely that if Greg is a rhino, or Winona is a cat, then Brian is a frog. It is improbable that if Greg is a rhino, or Mary went to the office, then Bill dropped the milk.
hypothesis: It is highly unlikely that either Mary went to the office, or Greg is a rhino.
valid_hypothesis: It is highly unlikely that either Mary went to the office, or Greg is a rhino.
invalid_hypothesis: It is certain that either Mary went to the office, or Greg is a rhino.
hypothesis_assertion: Either Mary went to the office, or Greg is a rhino.