And by the way, while I have been citing the OED recently, that is from my personal preference, but I acknowledge that it is not the only dictionary, nor the only style manual. (Indeed Oxford usage is out of step with much of the rest of British English usage over such matters as the spelling of "recognize" and similar words; I favour the Oxford usage since it echoes more closely the Greek root "-izein", but I, well, recognize that other British English users prefer the spelling "recognise".) As I say, one's personal preference does not a grammar rule make.