If I write something wrong on a discussion I can edit it?

Friend you can't edit the discussion once you post it before posting the discussion you can edit whatever you want but not after posting the discussion. Even i have done a mistake in the previous discussion where it was spelling mistake but i all ready posted that discussion. Once i saw that discussion then i realize that i have missed to type Worship rather than Woship. So it happens because we are human beings. As of now i don't know any kind of option called edit after posting the discussion.

I don't think you can once you have submitted it, although you can add comments to make corrections. I've actually had the times have wanted to go back to change something but I don't know how, does anybody else know?