The meanings of words can, and do, drift. Even dictionaries acknowledge that. You might not like it but so be it. I don't like the way that the meaning of "beg the question" has drifted, for example, but there's sod all I can do about it. Genocide has come to mean the killing of very large numbers of people in a nation in a number of modern contexts. Tough if you don't like the way the word is so used. To pick up Carol on this technicality, as you apparently perceive it, is indeed a classic example of nit-picking. I suggest you stick to taking Carol on over the real issues. If you can.