how keen your observation?

How keen your observation?
Which light is on the top of traffic light? Is it Red or Green? Your first thought probably is that this is an easy question to answer. However, put yourself in this position-you are on a quiz show that pays a lot of money for correct answers. You must answer this question correctly to win the top prize, Now then, which light is in the top, the Red or Green?
If you have been able to picture yourself to the above position, you are probably hesitating now, because you’re not really sure which light is on top, are you? If you are sure, then you’re one of minority who has observed what most people only see. There is a world of difference between seeing and observing; proven, of course, by the fact that most of the people to whom we put above question either give the wrong answer or are not sure. This, even though they see the traffic light countless times every day!
By the way, Red is always on the top of the traffic light, Green is always on the bottom. If there is a third color, it is usually yellow, for caution, and that one is always in the centre.