These days, some people want to talk about tritypes–the idea that it takes three points on the enneagram to convey a personality type.
To which I say right on!
However, they can’t be just any three points, or even any one type from each of the three “triads.” In the the Structural Enneagram model, you can’t be, for example, a Two-Five-Eight.
The introduction of tritypes marks a recognition of a deficiency in the conventional enneagram. But tritypes are like a wad of gum plugging a hole in a dyke. And it is just one hole among many.
The Structural Enneagram provides solid solutions to the problems of the existing enneagram.