Oddly Enough Article | Reuters.co.uk: “LONDON (Reuters) – A Spanish doctor believes he has discovered why offside decisions in football matches are often so controversial.
Francisco Belda Maruenda, a family doctor in Murcia, said in order for the offside rule to be applied correctly referees and linesmen must keep at least five moving objects in their visual fields at the same time — two attacking players, two defenders and the ball.”
But the human eye and brain cannot process all the necessary information to do it, and then make an instant, correct decision.
“This is beyond the capacity of the human eye, which may explain why so many offside decisions are controversial,” Maruenda said in a report in the British Medical Journal.
And I always thought it had something to do with birthdays and wedlock out of 😉 (Just incase one of my kids reads this).