N = I, G = O, D = A
I will ignore the word "Dweeb" which appears to have been stuck in there because there was an extra intersection region that they felt obligated to label. These aspects should rightly be treated, not as regions on a Venn Diagram, but as contiuous variables, defining a space with 3 axes. If we wish to be more binary in our thinking, we can take the origin of this 3D space to represent a dividing point between N and NOT N, G and NOT G, and D and NOT D. An individual's type then corresponds with a point in this space, and we can categorize them by which of the 8 regions they lie in. This is not particularly revolutionary, and similar treatments have been proposed previously. The 8 resultant typings are shown in the following diagram, along with extreme examples for clarification. The up arrows indicate high (positive) values and the negative arrows indicate low (negative) values, and over-bars indicate negation (i.e. boolean NOT).