>>5138782It's an abstraction of the nose. If you want to take it further, lines themselves are abstractions of reality, a form of language. The fidelity and accuracy of the line takes a back seat to the meaning that line conveys to the viewer. Most people will read that as representing the tip of the nose, or the overlap of the nose over the face, or the cast shadow of the nose. If you can't see it, that's on you.
