..is the least acknowledged valuable learning. The list of teachers can include your competitor, your foe, your sibling, your boss, etc. The list is not exhaustive, especially if you value this learning.
Side Note: Sad that we actually end up repeating the ‘What not to do List!’
As an after thought, I just realized that the list (of teachers) has a pattern. Seems to be falling under the ‘rivalry’ theme. Aren’t we more open to being extremely critical of our rivals. Watching their every move and making assumptions along the way. Learning ‘what not to do’ then becomes subjective making the learning futile.