I've heard people suggest that those with bipolar disorder, autism, etc. may be "un-typable," and I'm wondering what others' thoughts are on emotional/cognitive disorders and typology in general.
If a disorder is said to cause specific personality traits, behavior, and modes of thought, does that potentially limit the number of types possible for an affected person? Or does it simply place them outside the realm of MBTI, creating complexity too great for it to handle?
For example, my brother has a chromosomal disorder causing serious physical, cognitive, and behavioral issues. He's considered mentally retarded and based on the typical MBTI tests and descriptions, his cognitive limitations place him in the S camp. I know that sensors can be extremely intelligent and that intuitors aren't necessarily bright. It's just that if he's an intuitor, it certainly manifests differently in him than in those of higher intellectual ability. Very few (if any) people I've met with cognitive handicaps are interested in what most would consider "abstract theory," a trait typically associated with Ns. Also, what little I've read (it was only recently identified) seems to point to a correlation between xSFx and my brother's disorder.
Anyway, what disorders or general limitations do you think make someone's personality resistant to typing? What other thoughts do you have related to this idea?