I agree with some of what you say, but to say that England fans are just angry because Armitage will outdo Robshaw is a bit simplistic. I'd say they're angry because international qualification has become a complete farce - and it was already pretty laughable - and the prospect of capped players playing for a second country because the first country isn't giving them enough attention is ludicrous. In the case of Armitage, at least he has some link to France aside from a work contract, but he was capped by England and that should be it. France recently presented ten foreigners as being of interest for their squad - that's two thirds of a team whose only link to France is that they're paid to work there. Madness! »
I was under the impression that the difference between a knock-on on a charge-down depended on the trajectory of the ball. If it's travelling upwards you charge it down, and if it's travelling downwards you knock it on.