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I apologise for my outburst, I was in a bad mood this morning, and while I admit the term World-Class causes some confusion (it really shouldn't though) I don't know how on the earth the term Technical Ability does. Player’s Technical Ability is basically how he recieves and keeps possession of the ball. How he positions his body to receive a ball, his first touch, how he moves with it, and how he keeps the ball in an area close to his body where he's always in a position to pass or evade a player. The players with great Technical Ability are the ones that appear to have a lot of time on the ball, especially in tight areas of the pitch. Someone like Scholes barely breaks into a trot, yet he's always got space, it with Zizou.
Anyone who's ever played in Central Midfield at any level can understand how congested it gets in there and how little time you have to do anything. Most mere mortals couldn't even trap the ball and get their head up before being creamed by a player at Premiership Level.
As for the term Class is permanent, Form is temporary. It's true to an extent. You see it every weekend against us. There's always some clown who plays Shite every other week and then pulls out a blinder against us. They're not a classy player; they've just found some form.
Some goes the other way. If someone like Rooney has a shite game or a run of games, then he's out of form; he's still a classy player though. Of course players are eventually going to get old and not be the same player they were an X amount of years ago, that's a fact of life, as I said the term was never meant to describe a player 40 years into retirement.