I'm agreeing with the idea of the article, but I believe that Tacit knowledge which can't be attained with practice would call Talent or In-born gifts. For example, no matter how much chess I'll play and deliberately practice for 20 years I can't beat Fischer, Kasparov, Karpov etc.. since they are talented (Tacit knowledge) that doesn't mean they can't open their talent through books like "Bobby Fischer teaches Chess" or books about chess by Karpov (but who would do that during matches of chess). Deliberate Practice is the best way and most fast method for acquiring a skill