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Demanding meaning is reasonably hard to grasp. It refers to someone who is vitally choosy and judgmental.
A persnickety individual usually pay strict attention to detail and has high standards when it comes to criteria and perfection. Their meticulousness can be viewed as laudable, but it can also intensify
unreasonable criticism and unjustified dissatisfaction. Being persnickety is commonly connected with detailed focus on specifics but can also be seen as a type of obsessiveness.