[turbojet1321]

My point is that it isn't really a different slice, though. The vast majority of the "sitting" occupations are white collar; the vast majority of the "standing" ones blue collar.

[Nevermark]

So think of it as a concise objective way to settle what is blue color from white color, for purposes of a study.

No definition will be perfect, but this one does pretty well as you point out.

It also naturally provides an objective gradation, which many definitions that stand in for blue collar” or sit in for “white collar” won’t provide.