Why MBTI doesn't work

[Expat]

In MBTT, there are two ways of determining type:

1) Dichotomically (the most common method)
2) Functionally (closer to socionics)

I can't remember to have seen a nr 2 Functionally test. Where have you spotted that one?

Ages ago such a test was posted here, I think (which is not very helpful of course).

Another thing to keep in mind is that altough MBTI may be less accurate because of their lack of information elements, their simplicity of dichotomy's excels in convenience.

But what's the point of having a "convenient" method that is less accurate?

You could, for example, be on the S/N border,

This also applies to socionics I would think?

You could for example be on an Fe / Fi border.

Well not really, although for some types (and some individuals of some types) it may be difficult to spot, and of course even more so if you are talking about tests.