Converse: If the two lines do not intersect in the same plane then the lines are parallel. contra positive: If the two lines intersect in the same plane then the lines are parallel.Converse: If the two lines do not intersect in the same plane then the lines are parallel. contra positive: If the two lines intersect in the same plane then the lines are not parallel.Contra positive: If the two lines do not intersect in the same plane then the lines are parallel. converse: If the two lines intersect in the same plane then the lines are not parallel.Converse: If the two lines intersect in the same plane then the lines are parallel. contra positive: If the two lines intersect in the same plane then the lines are not parallel.