context: A toddler is sitting at the bottom of a slide and smiling.
hypothesis: Chances are about even that a toddler is sitting at the bottom of a plastic slide and smiling.
valid_hypothesis: Chances are about even that a toddler is sitting at the bottom of a plastic slide and smiling.
invalid_hypothesis: It is highly unlikely that a toddler is sitting at the bottom of a plastic slide and smiling.
hypothesis_assertion: A toddler is sitting at the bottom of a plastic slide and smiling.