In regards to the MBTI:
Step 1: Understand the Forer Effect.
Step 2: Use a dogmatic style of writing in your personality profiles.
Step 3: Label your collection of profiles with an overall name that people will come to trust as a tool with practical uses for a certified practitioner.
Step 4: Sign a non-disclosure agreement regarding the above steps.
In regards to the Socionics theroem:
Doesn't and cannot apply since Socionics doesn't claim any official status as a Science and doesn't need to in my opinion.
Because as a community driven area of study it promotes a more 'healthy' debate in the realm of functional relationships between individuals.
On the other hand the MBTI promotes a less than 'healthy' debate between individuals as types with their supposed 'pros and cons'.