JohnDo, let me put this another way.

- Gulenko's 16 subtypes are an unproven theory, you run a risk by accepting it
- any person's typing is difficult to directly prove, you run a risk by accepting it
- any person's subtyping is very difficult to directly prove and depends on both of the above conditions, you run a doubly reinforced risk by accepting it
- your guesses as to how subtypes link up with VI are not infallible and depend on all the above conditions...
- now you also change the person's typing and subtyping and your descriptions of the subtypes and your understanding of regular types based on your own theories...

See where this is going? One big, neverending, reinforcing loop of uncertainty.