imagine it as a sharp, finely touched haircut. let's say someone comes into the shop and wants their sides trimmed, for example. the sides are slightly rough at first, and require a bit more touching. "Excuse me, Mr. Barber. The sides are looking quite uneven." said the customer. the customer was right. the sides did look a bit uneven, and one side was longer than the other. "Sure thing, Mr. Customer. I'll trim the sides a bit more." So the barber trimmed one side some more. However, the barber wasn't paying attention properly, and accidentally trimmed one side a bit shorter. It was acceptable, as the sides were a similar length, but the customer was picky. "You've managed to cut them wrongly again! Trim them evenly!" exclaimed the customer. "OK. Whatever." said the barber. although he was a bit tired of this, he trimmed it yet again. however, his laziness caused the sides to be done wrongly yet again, and of course this picky customer noticed. "You've done it wrong again!" shouted the customer. the barber, of course, had to tend to the customers choosings. although the sides had been acceptable on many occasions, the customer still requested another try, until the sides ended up looking worse than they had started. "I hate my hair! I asked you to do something about it, and now look what you've done!" the customer cried. The barber sat and looked at this mess of a job, and sighed. could he ever get it right?