Redundant binary representation

Redundant binary representation is a way of representing numbers so that it's easier to spot errors. It works by using more than one '0' or '1' to represent a number. For example, instead of using one '0' and one '1' to represent the number '2', you might use two '1's. That way, if there's a mistake, like one of the '1's gets changed to a '0', you'll still be able to tell what the number is.