there are two types of defense, they are team defense and individual defense
team defense i can see amar'e saying "no on taught me" but individual defense, that's all on him, that's all on you! you either go hard or you don't, there is not much to teach about defending a guy,
from the first time you step on the basketball court, when you're a kid, you just instinctively play defense, i think it's crazy to really even talk about it
when you're on defense you just have to think 'DEFENSE', and not about how many inches you will be taller this season, or how you're bulking up, this that, it's just focus and wanting to play defense
for whatever reason, a lot of guys just don't have the will or the drive to play good defense, you see it in the pros and in rec-league, where guys on my team, they're doing crazy ****, all focused on offense, i'm sure they're thinking OFFENSE while on DEFENSE, and that's the problem,
i thinking that this is where d'antoni is coming from, the thinking is that: "if i have to tell you to play defense with great effort, then that's on you, because it's a given that you play tough D, i'm trying to teach you the side of the ball so that we can get easy shots, and be more rested for defense because our hoops are so smooth and easy"
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