Righto. Fair enough. I just have a general aversion to these sorts of rules, mostly because there are around a ton of exceptions .. to the point where one wonde

Righto. Fair enough. I just have a general aversion to these sorts of rules, mostly because there are around a ton of exceptions .. to the point where one wonders about it all. You may have more expertise in this, so deferring it to your good judgment. I was delimiting my stuff to the Gladwell book which attacks " mastery ".