Error presupposes the existence of…

“To err is human,” so we are told. But as philosopher Josiah Royce (1855-1913) argued, the recognition of error assumes that an idea does not conform to objective truth. Just as disorder presupposes order, blindness presupposes sight, and evil presupposes a standard of goodness, so the notion of error presupposes the existence of truth.

Paul Copan, from “True For You, But Not For Me”, p. 30