Verb
To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force or effect; to overthrow; as, to invalidate an agreement or argument.
Source: Webster's dictionaryWhile we are under the tyranny of Priests, it will ever be their interest, to invalidate the law of nature and reason, in order to establish systems incompatible therewith. Ethan Allen
Just because a company falls doesn't invalidate what we can learn by studying that company when it was at its historical best. James C. Collins
Straight couples don't have to be monogamous to be married or married to be monogamous. Monogamy no more defines marriage than the presence of children does. Monogamy isn't compulsory and its absence doesn't invalidate a marriage. Dan Savage
Those who invalidate reason ought seriously to consider whether they argue against reason with or without reason. Ethan Allen
Our knowledge of the historical worth of certain religious doctrines increases our respect for them, but does not invalidate our proposal that they should cease to be put forward as the reasons for the precepts of civilization. Sigmund Freud
Abuse does not invalidate usefulness. Latin Proverb