context: Chances are slight that Gertrude is a mouse. It is probably the case that Mary left the football. It is probably not the case that Lily is yellow.
hypothesis: It is probably not the case that mary left the football, or Lily is yellow.
valid_hypothesis: There is a very good chance that mary left the football, or Lily is yellow.
invalid_hypothesis: It is probably not the case that mary left the football, or Lily is yellow.
hypothesis_assertion: Mary left the football, or Lily is yellow.