Pleading of facts indicating contract not obligatory generally

Any fact going to show that a contract was not obligatory, though executed, may be pleaded as a defense. (Orig. Code 1863, § 2797; Code 1868, § 2805; Code 1873, § 2856; Code 1882, § 2856; Civil Code 1895, § 3706; Civil Code 1910, § 4300; Code 1933, § 20-901.)