"Most other attempts at software like this are coarse-grained in terms of their view of what a feeling is, " said Dr Jason Rentfrow, a senior lecturer in the department of psychology at Cambridge University.

BBC: App taps phone and personal clues to your happiness

This change in how FB lets us experience each other, a change that leave many feeling creeped-out, is what the copyright hoax reveals.

FORBES: Not Liking Post-IPO Facebook As Much? The Copyright Hoax Shows Why

This learning process leads to what we shall call tacit knowledge a feeling for what you are doing that is hard to put into words but easy to demonstrate in action.

FORBES: Why Apprenticeships Are the Fastest Way to Acquire Skills