term:

Rebut

rebut vt

re·but·ted
re·but·ting
[Anglo-French reboter rebuter to answer a charge, bar from an action, literally, to repulse, rebuff, from Old French reboter, from re- back + boter to push, butt]
: to refute, counteract, or disprove (as opposing evidence) by evidence or argument [ damaging testimony] [ a presumption]
re·but·ta·ble adj

re·but·ta·bly adv

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.