context: There is almost no chance that John picked up the milk. We believe that Mary moved to the office. Chances are about even that Daniel got the football. It is highly unlikely that if John picked up the milk, and Mary moved to the office, then Greg is a lion. Chances are slight that if Daniel got the football, or John picked up the milk, then Julius is a frog. We believe that if John picked up the milk, and Mary moved to the office, then Gertrude is a mouse.
hypothesis: We believe that either Mary moved to the office, or Gertrude is a mouse.
valid_hypothesis: We believe that either Mary moved to the office, or Gertrude is a mouse.
invalid_hypothesis: It is probably not the case that either Mary moved to the office, or Gertrude is a mouse.
hypothesis_assertion: Either Mary moved to the office, or Gertrude is a mouse.