Premise: A tall girl hurdles.

Hypothesis: A girl is walking on a track.
no

Premise: A woman competitor on a white horse jumping over a fence.

Hypothesis: A jockey competing at an event.
it is not possible to tell

Premise: A motorcycle racer going down a steep, dirt hill.

Hypothesis: They are racing down fast.
it is not possible to tell

Premise: A dirt biker lands on a ramp.

Hypothesis: The dirt biker falls off the ramp.
no