Duplication is not bad in itself. It could be another way of saying "flexibility". For instance, the keyboard shortcut for "folder up" is "alt+up", and you could call it duplication as well. There are cases when duplication is redundant and confusing, and in other cases it's a good and useful thing.

This question might be relevant too.

BTW, I think "duplicity" means "hypocrisy" rather than duplication :)

Duplication is not bad in itself. It could be another way of saying "flexibility". For instance, the keyboard shortcut for "folder up" is "alt+up", and you could call it duplication as well. There are cases when duplication is redundant and confusing, and in other cases it's a good and useful thing.

This question might be relevant too.

BTW, I think "duplicity" means "hypocrisy" rather than duplication :)