But it isn't a lie yet. What we do now decides whether it is one. Look at the
http://www.mspaforums.com/showthread.php?46270-HeartStuck-4-%28-There-Can-Be-No-Hentai-%29/page93 Kanaya doesn't actually say whether she ever noticed the scar. It's entirely possible she is surprised by the scar now only because she accepted it, like The Mather said. I personally don't like white lies, but even if you do, Aradia won't like it.
Guys, it's more important not to be a dick than not to be seen as a dick. I mean, come on.
DD : I think this is important. I think the adventure is hilarious, but without good characterization I wouldn't enjoy it. The lesbians aren't enough. If you don't like discussions over matters of characterization, couldn't you just skip over them? Besides, just using ELOQUENCE to get yourself out of every situation without addressing whether your actions were wrong or right, or taking peoples' feelings into consideration, is kind of terrible? Being charismatic is entirely separate from being a good friend.
EDIT: I am a person with opinions. I tend to express them. I don't get angry over this shit, and I'm sorry if I ever sound it. If I'm too forceful, just tell me.