Scar makes a small grunt that's nearly an unamused laugh. And what is the point in telling him that?

"There is nothing I wish to share with you." If that isn't already obvious. Much of what he keeps from the world is for his own protection.

"Though the fact that you do not recognize me the same way as the others tells me that you are not from Amestris." Scar frowns. No, there seem to be a lot of things Greed 'doesn't know.' What they are, exactly, he can't quite tell.