Quote: knockersbumpMKII "...
what you can measure is how fast the ball was passed, '"
Irrelevant. The only thing that matters is whether the hands propelled the ball not forwards of the passer, in the instant the ball leaves the hands. It doesn't matter if he passes it slow or fast
Quote: knockersbumpMKII "...any rotation '"
Irrelevant. It doesn't matter if rotates not at all, or like a pulsar.
Quote: knockersbumpMKII "...& at what angle, '"
Not relevant, the only thing that matters is whether the hands propelled the ball not forwards of the passer. The angle could be anything, depending which way he is facing, which way he is moving (if at all), but it doesn't matter
Quote: knockersbumpMKII "...the relative direction/speed of both players, '"
Not relevant. The only thing that matters is whether the hands propelled the ball not forwards of the passer. His speed doesn't matter, nor does the speed of the other player.
Quote: knockersbumpMKII "..wind speed '"
Not relevant. The only relevant moment is the instant the ball leaves the hands. Any effect caused after that by the wind acting on the ball is not taken into account, if the ball was legally passed not forwards, and then a sudden gust of wind blew it forward 50 metres, that is still not a forward pass.
Quote: knockersbumpMKII ".and that would be how you relatively accurately judge a forward pass. '"
So QED, it actually wouldn't.