My interest in gathering together a collection of this sort was generated by a fortuitous combination of historical studies under Professor Keith Lehrer and studies in cognitive science under Professor R. Michael Harnish at the University of Arizona. Work on the volume began there while I was an instructor in the Department of Linguistics and was greatly encouraged by participants in the Faculty Seminar on Cognitive Science chaired by Professor Lance J. Rips. I wish to express my appreciation to all of these and to many other individuals with whom I discussed the possibility of contribution...

Historically the medical profession has waged many much-heralded "wars," such as the war against polio, the war against cancer and the latest wars on heart disease, obesity, and tobacco. But without question the longest war fought by the American Medical Association has been against chiropractors. The America Medical Association was once dubbed "the most terrifying trade association on earth," a truth the chiropractic profession experienced when 12,000 chiropractors were arrested in the first half of the twentieth century simply for helping patients with only their hands. A pivotal point in...