But surely of a group of 2000 children are born with similar tendencies, they are going to grow up with personalities more similar than if they had completely different tendencies? Otherwise what is the point of astrology, if all it says is that you are born with this tendency, but it will have no effect of the way you are now, as you may or may not realise these tendencies, and whether or not you realise them will be no greater than chance in the general population?