I believe the answer is: A just-noticeable difference
In painting, A just-noticeable difference refers to the amount of things that needed to be change for a difference to be noticeable.
The threshold usually depended on the type of audience that being aimed toward, (for common audience, the threshold of differences would be relatively higher compared to expert audience)<span />
Slavery so that the blacks would have to work
Punishments for not following slave codes were severe because;
B.) Slaves were seen as property and not as humans
Fearing rebellion, slave codes were created to keep slaves subservient and fearful.
He was a good men who had to move on . King George argeed because he needed a break