Why doesn't Trigger realize that ............? Is she stupid?

So, when I did Anby's mission, when Trigger first encountered Anby, I found it strange how little she reacted to meeting someone so identical to Soldier 11. I thought they were pushing it too hard to make the surprise come later. To be honest, she does say she looks familiar, but come on, they look the same.

Obviously, I put on a clown face when, at the end of the mission, Trigger asks the proxies if Anby and Soldier 11 really look that similar since SHE CAN'T SEE.

Man, how embarrassing.