Learning BJJ Concepts or Techniques: Which is better and why?

Do you focus on mastering Techniques or understanding Concepts? A lot of early learning in BJJ is shaped and guided by the Instructor but at some point you will do your best to try to get better independently. Which is better to focus on- the technical details of a submission or the reason why it is applicable in the situation? The "How" & the 'Why" are both important components of mastering BJJ but where should you start? JT & Joey discuss how approaching the game from 2 very differe...