Split hairs Neutral

To make overly fine distinctions or argue about tiny differences that have little practical importance. It often implies that the speaker considers the distinctions unnecessary.

The idiom uses the image of dividing a single human hair into still finer parts. Because a hair is already very thin, splitting it suggests extreme precision carried to an absurd degree. English has used similar images of minute divisions for centuries in discussions of argument, logic and theology, where excessively subtle distinctions could be criticized. The phrase does not mean that careful analysis is always wrong: it is typically a judgment that the particular difference being debated does not matter in the situation. Modern speakers use it in everyday disagreements about wording, definitions and rules. Its figurative force comes from the disproportion between the effort of dividing something tiny and the value of the result.

We’re splitting hairs over a difference of two minutes.

I don’t want to split hairs, but the contract says “may,” not “must.”

Arguing about which shade is slightly darker feels like splitting hairs.