Premise: A bunch of bicycle riders getting ready to race.

Hypothesis: Racecars are revving their engines at the starting line.
no

Premise: A line of men riding horseback through the grass are all wearing period uniforms.

Hypothesis: A line of sad men riding horseback through the grass are all wearing period uniforms.
it is not possible to tell

Premise: The two men are engaged in a boxing match.

Hypothesis: Two people fighting in a boxing ring.
yes

Premise: A man outdoors is placing plants in a cart.

Hypothesis: A woman is indoors with her cart.
no