It would surprise virtually every American (but only a few Europeans) to know that neither the JD nor the MD degree is a doctorate. Each one is the first degree in its school, or discipline. Yet we presume them to evince advanced knowledge, even allowing people with two undergraduate degrees to be "professors" (really instructors) in American law and medical schools. In the school of law, the sequence of degrees is: JD (same as the LLB), LLM (hint: M...Masters), and JSD (Doctorate in Juridical Science). The JSD degree includes advance study, a comprensive exam (an academic exam graded by faculty--not a industry-qualifying exam like the bar), and a defended dissertation. A doctoral degree must be the terminal degree of a field, contain a comprehensive exam, and include significant original research in a defended dissertation. The JD misses on all three points. The title of the first degree in law, the LLB (bachalors in letters of law) was replaced with "JD" largely for marketing purposes in 1901 in the founding of the U of Chicago law school (by three Harvard professors) because prospective students were complaining about having two "B" degrees after seven years of school. People don't like to think they have gone to school for seven or eight years for two undergraduate degrees, but this is precisely what they have done. Nevertheless, the new law school in need of students complied with the "customer" complaint with a feat of mirrored marketing that was perhaps intentionally ambiguous. To eviscerate the ambiguity in Juris Doctor and a doctorate, one must look beyond the mere words.
The full essay is at "Professionals Over the Top."