[Mr. Bruce Wayne]

Hey guys I've been debating with a few friends for a while as to what the significance of Miranda Tate's scar is in the Dark Knight Rises. Personally, I believe they just showed the scar to let the audience know that she has a past and is possibly not to be trusted. My friends seem to think that it's the symbol of the League of Shadows. I would really appreciate your opinions. What do you guys think?