Evidence that we will never discover laws for human behavior

You will never come across a stream running up hill (even though Chesterton says it's not impossible). Nor will you ever be electrocuted touching an insulated electric wire, or will both ends of a magnet ever be north. Our universe, generally speaking, behaves with consistency. However, not everything in our universe is consistent. Some things will continually break any laws we establish. Those things are called humans.

On black friday, which I will not capitalize for capitalism's sake, Cards Against Humanity, a card game in the vein of Apples to Apples, raised their price for the game 20% from $25 to $30. Their sales rose slightly from last year's sales.

Of course it may have something to do with the people who like this type of game, but this is also good evidence that no theory of education or psychology or economics will ever be developed which will be more useful than a good teacher, psychologist or salesman.