The following 4 questions I believe remain the 4 great unsolved mysteries of the modern world.
1) If a man makes an assertion and there is not woman present is he still wrong?
2) If you are smoking in your own home and a intruder enters your house are you required to extinguish you cigarette now because it has now become his place of work?
3) When the UK government finally introduces ID cards will schizophrenics be required to carry multiple ID cards?
4) If the human race is so intelligent then how come we were able to put together the technology to put a man on the moon before we worked out that it would be a good idea to put wheels on a suitcase?