Interesting, as a native speaker I am only familiar with it meaning mutual exclusion, with a range of connotations from "the former is the opposite of correct"

Interesting, as a native speaker I am only familiar with it meaning mutual exclusion, with a range of connotations from "the former is the opposite of correct" to "let me adjust that thought slightly". However, Merriam-Webster supports my experience with the first 4 definitions and then drops a "but also" as the fifth. Sometimes I hate English. https://www.merriam-webster.com/dictionary/rather https://www.merriam-webster.com/dictionary/rather