The term "hair's breadth" is an idiomatic expression used to describe a very small measurement or distance. It refers to the width of a human hair, which is typically very fine and small. In a wider context, saying something is a "hair's breadth" away implies that it is very close to a particular limit or threshold, emphasizing the narrow margin or slight difference involved. The phrase is often used in both literal and figurative language to convey precision or closeness.
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