context: A toddler, sitting next to another girl who is slightly older, is using a bubble machine to blow a large bubble into the air.
hypothesis: We believe that sisters are using a bubble machine to blow big bubbles.
valid_hypothesis: We believe that sisters are using a bubble machine to blow big bubbles.
invalid_hypothesis: It is unlikely that sisters are using a bubble machine to blow big bubbles.
hypothesis_assertion: Sisters are using a bubble machine to blow big bubbles.