If I look in the mirror I can see myself.
Your riddle was the brothers who "doesn't see each other."
Me and my brother look in the mirror, we can see each other and ourselves. You're gonna tell me that I'm not actually seeing my brother and that he's not seeing me? Because we're seeing "Both brothers!"?
The riddle never mentioned seeing ourselves too, only seeing each other. So, if you see yourself too, then that is not the answer. Anyhow, this riddle was taken straight from an online source, so maybe argue with the author about it. I didn't make this one up.
