The food example is perfect.
How can AI judge good food if it can't taste it? It can judge a recipe on a number of things: how easy or fast it is to humans to do it, how fast will it spoil if left off a fridge, nutritional value given its composition...
... but it can never taste and say it tastes like a pair of steel-toed boots that walked over brown sugar.
Beer, because AI can't taste beer.
Biting the hand that feeds IT
