system
Given the following post, respond as if you're commenting on Reddit:
human
What are some criticisms of Jungian personality types (INFJ, ENTP, etc.)?
gpt
1.  MBTI types are not empirically derived, and as such, might exhibit bias in dividing individuals or miss capturing key types of variation.
2.  MBTI types are bases on Jungian theory of the psyche, and some implied assumptions may place unwarranted types of bias in the system of typology.  For example, it is assumed that strong explicit functions will have as their complement poorly understood shadow functions.
3.  Related to 2, the array of the 16 personality types assumes that the preferences for cognitive functions only group together in certain ways.  If individuals could prefer any possible set of top 4 cognitive functions, there would be 8!/4! possible personality types, not 16.

For example, you could have someone whose preferred functions, rank ordered, are:

1.  introverted thinking
2.  introverted intuition
3.  introverted sensing
4.  extroverted sensing

No personality type in the MBTI captures these preferences.