Premise: a boy in a purple shirt is doing a skateboard stunt on a wooden ramp beside a white building .
Correct statement: Chances are about even that a boy is trying to perfect a skateboard trick his brother showed him .
Incorrect statement: It is highly unlikely that a boy is trying to perfect a skateboard trick his brother showed him .
Correct statement: There is a better than even chance that a boy performs a stunt for the first time .
Incorrect statement: There is almost no chance that a boy performs a stunt for the first time .
Correct statement: It is probable that a boy is showing off his skating skills to his friends
Incorrect statement: It is impossible that a boy is showing off his skating skills to his friends
Correct statement: It is impossible that the boy did skateboard tricks in the summer
Incorrect statement: It is probably the case that the boy did skateboard tricks in the summer
Correct statement: It is highly likely that a boy is at a skatepark .
Incorrect statement: It is unlikely that a boy is at a skatepark .