h/t Roger James on LinkedIn (in a discussion about groupings and inclusion and exclusion in systems thinking | complexity | cybernetics prompted by Joss Colchester sharing the groupings diagram from the first Ramage and Shipp book, given to him by Sally Bean at the Systems Innovation conference https://www.linkedin.com/feed/update/urn:li:activity:7242481230212927489?commentUrn=urn%3Ali%3Acomment%3A%28activity%3A7242481230212927489%2C7242656367612755969%29&dashCommentUrn=urn%3Ali%3Afsd_comment%3A%287242656367612755969%2Curn%3Ali%3Aactivity%3A7242481230212927489%29

By Bob Williams

ALL METHODS ARE WRONG. SOME METHODS ARE USEFUL.BYBOB WILLIAMS

The Systems Thinker – All Methods Are Wrong. Some Methods Are Useful. – The Systems Thinker