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I'm sure you're correct, but be warned that starting a response with 'you do realize' is likely to make you sound like an asshole[0]

0. http://www.urbandictionary.com/define.php?term=you+do+realiz....

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If your citation is Urban Dictionary, I think I'll take the risk. I could have been more tactful, sure, but so could have the post I replied to.

No, he's right. "You do realize" always makes you sound like a jerk. You know very well that the person doesn't realize whatever it is, and you're rubbing their nose in it. If you intend to sound like a jerk, it's a fine go-to, but if not it should be avoided.

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