Your comment, gerard, is insighful. The psycholinguistic lens you gazed through is an excellent metaphor for our inability to leaves things unnamed. Clearly the variety of human behavior is SO GREAT that we cannot (in spite of good linguistic skills) tame it all into submission or control. It will become easier to really “understand” atypical human behavior when we have the neurological (neurons, fissures, neurotransmitters, etc) correlates to discuss instead of the behaviors. It may be a while and in the meantime I hope the contributors to DSM-V(5) know how greatly their decisions shape human society and human lives.

Perhaps more than any other profession, psychiatarists and psychologists have to be constantly aware of the dangers of language itself.
An ever-present human urge is to try to name everything in life—and many major languages are organized on an either/or basis—something is one thing or another thing, one thing or not that thing, this or that—not both, plus a third of fourth thing in addition. The urge to simplify complexities.
  Naming things tends to give humans a sense of power over those things—they move fron Unknown to Known. (Oh, we know what that is!)  Then, through a largely unknown process and over an unknown period of time, the known becomes settled, obvious, and even tends to exclude other possibilities that might be discovered if people’s minds were not already made up.
  This is a huge problem in diagnosis, obviously. There is no way to be absolutely sure in many cases.  This or that?  Or something else? Or both, and something in addition?  Or this minus that?  It’s a mare’s nest of confusion.
  The best that can be said is that all doctors and those who treat human beings’ health problems need always more and more knowledge and experience, PLUS
a sensitive, keen power of on-going observation and by remembering to consider intuitive responses carefully.
  Anything less will often lead to trouble.  A decent respect for the unique, individual human soul is at stake in every case that sits down in the chair in front of you.