Premise: A person is sitting behind a old , black Singer sewing machine with a note taped to their dress .
Correct statement: There is a very good chance that the person is sewing .
Incorrect statement: It is highly unlikely that the person is sewing .
Correct statement: It is probably not the case that a woman is attempting to craft a new dress using an old , black Singer sewing machine .
Incorrect statement: It is probably the case that a woman is attempting to craft a new dress using an old , black Singer sewing machine .
Correct statement: It is probably not the case that the person is old .
Incorrect statement: It is certain that the person is old .
Correct statement: It is probably not the case that an old woman sits behind her sewing machine .
Incorrect statement: It is certain that an old woman sits behind her sewing machine .
Correct statement: It is certain that a person is sitting on a chair .
Incorrect statement: We doubt that a person is sitting on a chair .