I took the time to read your question a little closer, and I have the perfect example.
a good clear example which will illustrate -- ideally, even to non-technical people -- that the naive implementation may technically be a functioning solution to the problem, but practically be utterly unusable.
Try Bogosort!
If bogosort were used to sort a deck of cards, it would consist of checking if the deck were in order, and if it were not, one would throw the deck into the air, pick up the cards up at random, and repeat the process until the deck is sorted.
