“The reasonable man adapts himself to the world: the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.”  Remember Shaw’s contrarian saying before you rush to discard the workings of the fools.
Goodness can be born from error, the right thing done for wrong reasons and truth may come from the mouth of the innocent and even of the liars. False premises result illogically in true conclusions.
Some errors are even useful, without them there would be no change, learning or growing experience. Other things must go worse before they can to go better. Particularly, do not stop wrong people while they do errors.
Be wise and judge things by their merit and consequences, as it is reasonable, not by their source. Look at the billiards not at the cue.
More than this, with a light hand and time given, you can turn an error or a bad thing into a good one or at least learn and make learn something useful from it. In truth, the wise, as the Censor said  can profit more from the fools than the fools from the wise.
For this, instead of rushing righteously to exclaim “Aha, this is an error!” tell yourself “Whatever this may be, let me see what good can be drawn out of it?” As one of my professors used to say, facts are friendly so that, whatever they are, it is of no se to fight with them, you can build something on them instead of trying to force them to fit what you expected.
 Shaw, G.B. Man and superman; A Comedy and a Philosophy, Archibald Constable & Co., Ltd., Westminster, 1903.p. 238
 Cato the Elder (Marcus Porcius Cato (234 BC - 149 BC): "The wise men learn more from the fools than fools from the wise; for the wise avoid the eror of the fools, wile fools do not profit by the example of the wise." Plutarch's Lives, Volume 2 (Cato the Censor), Hickman and Hazzard, Philadelphia, 1822