premise: A young man sits fiddling with his shoe. hypothesis: A young man is trying to un-knot his shoes.
neutral: Just because someone is fiddling with their shoes does not mean they are trying to untie the knots in their shoelaces. Someone can be fiddling with their shoes because they are adjusting the velcro or relacing there laces or adding charms to the lace holes or trying to pull the plastic off of their aglets.