Originally Posted by Fred Streed
I kind of feel sorry for those whom only know one way to spell a word.
I stole that from someone, I can't remember who, perhaps Mark Twain.
Edit: Is that "who" or "whom"? Never could get that one straight.
Whom is the objective form.
A good rule in this case is if in doubt leave it out, that is, the "m".
A decent bookmark for the interested: