On Nov 30, 2005, at 22:02, Dave Howell wrote: > you can solve all "Mr./Dr./Ph.D." cases by the fact that if a word > starts with a cap and ends with a period, it's not a sentence. I'm not sure that's a very good rule, Dave. There are two sentences here. The above rule may catch titular abbreviations, but over-generalises to produce a false negative in the above example. So in solving one problem, you introduce another one. It's relatively easy to make another rule to catch the problem in this case, but it would probably have been simpler to just make a specific rule to eliminate titular abbreviations, since there really aren't that many of them. matthew smillie.