This fallacy operates on the principle that squeaky wheel gets the grease. If something is wrong with a conclusion it will 'squeak'. If we do not hear any complaints from the shop one can assure that the change adopted is OK. In experimental work, this fallacy arises when decisions are based on the absence of contrary evidence rather than the presence of supporting evidence...The cure for this fallacy lies in reaching conclusions based on the presence of positive supporting evidence rather than lack of contrary evidence.