https://jamesgrubman.com/wp-content/uploads/2022/06/2022-06-There-is-no-70-rule-JGrubman-IFOJ.pdf https://jamesgrubman.com/wp-content/uploads/2022/06/2022-06-..

https://jamesgrubman.com/wp-content/uploads/2022/06/2022-06-There-is-no-70-rule-JGrubman-IFOJ.pdf https://jamesgrubman.com/wp-content/uploads/2022/06/2022-06-... It seems that the 70% "rule" is on very wobbly legs. I wonder if there are any actual studies - well, now I know what I'm doing this afternoon ;)