That’s the way the cookie crumbles

Our son (10): ‘Let’s organize a cookie race!’
Me: ‘OK, but we did it already at the weekend..’
He: ‘It didn’t count – out of several reasons.’
Me: ‘Like what..?’
He:
‘First of all it was not the 2 of us. It was only me making cookies, and you – tasting them. We cannot call me a winner if in the competition it’s only me entering..
So, all of us in the family need to participate – apart from you.’
Me: ‘Why is it so?’
He: ‘The jury is not allowed to participate in the competition, that wouldn’t be fair to the others.’
Aha, so we still know these things, when we are 10..