Verdadero y falso. Herejía y sentido común para el actor

Mamet emphasizes truth over technique, but how practical is this in the high-pressure world of acting? Did anyone find this perspective illuminating or challenging?

Mamet's no-nonsense tone made me think about how much of acting is about authenticity versus performance. Would this approach work for all types of actors?

His heresy against popular methods made me wonder what personal experiences led him to develop these ideas. How do others interpret his stance on 'truth' in acting?