Who's a champion?

[mel_blog]

You know when some grammar or spelling point gives you pause, and then completely consumes you until conquered? And I mean without giving up - doing the simple solution of looking up the answer (also known as the quick, efficient solution, but what personal glory is there to be attained from doing it that way, I say?). And notice how the more

Comments

[sui_generis]

Easy rule of thumb to apply in those cases?

One is possessive, one isn't. The apostrophe in this case denotes "is", so that one's the verb form, regardless of how it sounds alike.

There are no possessive pronouns (that I can think of) that use an apostrophe.

[mel_blog]

You'll be amazed to hear that I actually know all that (well, when I can access my brain - unlike this morning when I was debating it pre-coffee). A moment of complete retardation.