context: A man is painting letters using a stencil onto a round stand-up sign that is lying sideways.
hypothesis: Chances are about even that a guy works on a sign by putting letters on its round surface while it's on the ground.
valid_hypothesis: Chances are about even that a guy works on a sign by putting letters on its round surface while it's on the ground.
invalid_hypothesis: There is almost no chance that a guy works on a sign by putting letters on its round surface while it's on the ground.
hypothesis_assertion: A guy works on a sign by putting letters on its round surface while it's on the ground.