She isn't here, so I guess I can reply. Particular word usage with a deeper meaning, like satire or metaphor. Sometimes we have to warn <sarcastic> when we write the opposite of what we mean, because it can't be easily communicated in writing, although it can be communicated IRL. The reason why emoticons are so important on the internet. Or oral emphasis on important words, like my spelling out the word "extremely" on the post to which she was referring. The same things which can be done with sign.
