The fallacy of criticising a solution to a problem because it is imperfect and does not match up with other perfect, but unrealistic, solutions. It is also known as the perfect solution fallacy. An economist who criticises economic liberalisation for being an imperfect solution to poverty, for instance, would be guilty of the nirvana fallacy if the more attractive solutions he proposes are too impractical. The criticism levelled against the use of umpiring technology in games like cricket, citing imperfections in the performance of such technology, is also an example of the perfect solution fallacy.
