Premise: Four people of all different walks to life share one park bench while one man plays the guitar .
Correct statement: There is a better than even chance that people are talking to a guitarist at a park .
Incorrect statement: It is improbable that people are talking to a guitarist at a park .
Correct statement: It is probably the case that several people are enjoying a warm day in the park .
Incorrect statement: It is impossible that several people are enjoying a warm day in the park .
Correct statement: It is certain that a man on a bench is playing guitar .
Incorrect statement: It is probably not the case that a man on a bench is playing guitar .
Correct statement: It is highly unlikely that the four people do n't know one another at all .
Incorrect statement: It is likely that the four people do n't know one another at all .
Correct statement: There is a better than even chance that a man playing music for his friends .
Incorrect statement: It is highly unlikely that a man playing music for his friends .