• (a.) Capable of being contradicting.
Con`tra·dict'a·ble adjective Capable of being contradicted. 
contradictable 1. Characterized by asserting or expressing the opposite of a statement which was made previously. 2. Descriptive of being contrary to or being inconsistent with. 3. That which can be argued against; such as, the truth or correctness of someone's statement or claim about something.