context: It is unlikely that Emily is a mouse. It is impossible that Mary went to the office. It is probably the case that Lily is a lion. It is probable that if Lily is a lion, and Mary went to the office, then Greg is a swan. It is likely that if Lily is a lion, and Emily is a mouse, then Brian is a rhino. It is highly likely that if Mary went to the office, or Lily is a lion, then Bill got the milk there.
hypothesis: It is certain that greg is a swan, or Emily is a mouse.
valid_hypothesis: It is unlikely that greg is a swan, or Emily is a mouse.
invalid_hypothesis: It is certain that greg is a swan, or Emily is a mouse.
hypothesis_assertion: Greg is a swan, or Emily is a mouse.