Is there any situation that requires the use of specifically one of or both the words "less" or "more"?

If quantity(s) A is less than quantity(s) B, then by definition quantity(s) B is more than quantity(s) A. It seems to me that you can use only the word "less" or only the word "more" to describe any situation. Is there any situation where specifically one of or both the words must be used to adequately describe a comparison? Or is it technically redundant to have both?