An anomalous plea is one which contains both affirmative and negative matter. Anomalous pleas are of two kinds.

(a) Where the complainant in the charging part of his bill has anticipated a defense of the defendant and then proceeded to deny it, and the defendant sets up the anticipated defense and denies the denial of the complainant.

(b) Where the defendant in his plea alleges matter inconsistent with certain matter in the complainant's bill and denies such inconsistent matter.