The "ambivert" issue - conflicts between Socionic and Classical E/I

[Petter]

He thinks that socionics and Myers-Briggs types are the same.

No, I don't think the types themselves are the same. Descriptions of types by socionists differ from descriptions of types by MBTI typologists. But a socionics type corresponds to exactly one MBTI type; ILI corresponds to INTJ etc.

@Petter Rick was definitely not of the view that there are only two different levels, btw

I don't think that was his view, but he argues (in the blog post) as if there are only two levels.