BALL DEFLECTS FROM UNAWARE INJURED PLAYER IN OFFSIDE POSITION; GOAL?

Question: Sounds stupid but…

Me and my friends were having a debate in the pub about the offside rule. I was a neutral in this debate but would be interested to know what an official referee would do:

If a player is laying injured in an offside position while play is continuing, and a shot that was going in anyway is deflected off his leg or head unintentionally, is it offside? If the player wasn’t there and the shot was going in anyway, surely as the player had no intent the goal should stand?

Answer November 28, 2012):
But his presence DID have an effect on play — “deflected off his leg or head unintentionally” — means by definition that he interfered with play.

We need to remember that it is only a supposition that the shot was going to go in anyway. There is, unfortunately, no way of proving that, without the deflection, the keeper might or would have made the save. In all events, Law 11 does not require or even presume that the attacker in the offside position must INTENTIONALLY become involved in active play; he only needs to BE involved in active play. If he had been standing up in an offside position and a shot from a teammate had bounced off his back into the goal, wouldn’t this be offside position? Suppose the player on the ground were dead and the ball deflected off him into the goal — it’s still an offside violation (though, to be fair, we should probably have stopped play before all this due to the “serious injury”).

This was illustrated in the 2008-2009 Laws of the Game on p. 101, illustration 1 (last time it is shown, but the principle still applies): “An attacker in an offside position (A), not interfering with an opponent, touches the ball.” And the ruling on the same page says “The assistant referee must raise the flag when the player touches the ball.”