Quote:
How many different colours of hair are there? Not so many, isn't it? But how many types of eyes are there? much more. So the number depends on what are the considered criterias.

They claim that 9 types are real and objective representation of personality. Real and objective? Objective? How can you objectively represent a forest, where each tree is unique? That what personality is like  unique.
Never mind, let's get back to enneagram basics. Where all the 9 types come from? Is there an underlying structure explaining why there are only 9 types or someone just decided that 9 is a pretty number?