Premise: Two little children , one boy and one girl , laugh as they sit on the grass .
Correct statement: There is a better than even chance that a brother and sister are playing in the grass .
Incorrect statement: It is improbable that a brother and sister are playing in the grass .
Correct statement: It is impossible that the boy and the girl are part of a family .
Incorrect statement: There is a very good chance that the boy and the girl are part of a family .
Correct statement: It is impossible that a brother sits with his sister outside
Incorrect statement: We believe that a brother sits with his sister outside
Correct statement: It is impossible that a child finished telling a joke .
Incorrect statement: There is a better than even chance that a child finished telling a joke .
Correct statement: There is a better than even chance that a brother and sister sit in the grass .
Incorrect statement: It is highly unlikely that a brother and sister sit in the grass .