You obviously know **** all about cricket.
Nah, only played it all my life, what the hell would I know.

Seriously is that what this has come to? Personal attacks? Stick to the topic. Don't worry about the person (me) making the argument. Ignore who they are, and concentrate on WHAT they are saying.
You have to develop your "skill set" if you want to survive in the longer form.
Oh really? Like Steve Waugh totally taking the pull shot and hook shot out of his game. How is that developing your skill set? How would that tactic have gone in T20? I agree the mental part of the game is a part that needs to be developed for Tests, but if a player has the physical shot-making and hand-eye coordination (like Warner) he should be able to adapt.
Someone like Ed Cowan who is more limited with his skills, will never make it in T20 cricket. Tests are more his go. He is not good enough to play a form of cricket where you have to score of GOOD balls and score at 1.5 runs per ball.
That's why it's is nearly impossible for over 40 retired players to ever come back, unlike T20.
Who are you referring to? Brad Hogg? He was the only over 40 in the T20 international. And with his superb form in the Big Bash (no one could pick his wrong-un) he would theoretically be more than capable of playing in the test side and performing well if the sleectors wanted to go down that path.
. i.e players with diminished skills can play T20 only.
Is this where I get to say "You obviously know nothing about cricket"
I mean seriously do you have any idea of the hand-eye coodination needed to play the ramp shot? Do you know how hard it is to score at 1.5 runs per ball?? You act like anyone can do it. They can't. In Tests, many players hardly score runs off good balls. They let them through to the keeper or defend them. They score of the loose balls primarily.
To suggest only "diminished skills" are suitable for a game where you need to score twice as fast, is totally ignorant.
Just explain to me, on what planet will Ed Cowan's "long form of the game batting skills" adapt to T20?