Quote Originally Posted by AFDavis11 View Post
I would like permission to suggest that this is not feedback, at least in the honing sense. The hone provides feedback suggesting that it is sharpening the blade, or that the blade is in fact sharp. Tests provide sensation, or a reaction, or a sound that indicates the condition of the blade. The razor is not getting sharper and providing feedback in the moment, it is providing information post action.
Close. I'd say feedback is the observation of the result of an action, by the originator of that action.

Audio output getting fed back in an amplifier is feedback.
Doing a survey of customer satisfaction is feedback.
The feeling of a razor moving over a stone is feedback.