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Demanding definition is fairly difficult to understand. It refers to someone who is exceedingly particular and nitpicking. A persnickety individual usually nitpick and does not settle for less when it comes to criteria and excellence. Their
attention to detail can be regarded as praiseworthy, but it can also magnify extreme censure and unjustified dissatisfaction. Being persnickety is typically related to exact attention to detail but can also be seen as a type of obsessiveness.