It's controversial, to be sure. I did state "some sources" say this.
The article I would like to post here is no longer online, but here is a discussion of it with other sources cited and some people saying "That's utter BS" and others saying "Yeah, that's what I was taught ages ago.":
The article I would like to post here is no longer online, but here is a discussion of it with other sources cited and some people saying "That's utter BS" and others saying "Yeah, that's what I was taught ages ago.":
https://www.metafilter.com/156154/A-third-way-Non-violent-pr...