No, I'm saying all along, that Pep, and all coaches scouts managers everywhere, are making an educated guess.
They don't ' know' at all.
They don't even 'know' if the 11 senior pros they put out will be the right team nor if the 50 mil centre back they sign, will actually succeed let alone being able look at a kid & say for sure whether he can make it, just by watching training sessions.
The only time they find out, for sure, is when the kids play a number of senior games & in some cases, like Pep with Bojan, & Ferguson with several they still get it wrong.
By the way, if you picked the kids who 'hold their own' in training, we would have had about 40 in the last few years, they are fucking good.