Insight from a two year old

Last week from out of no where Timothy said to me, "Sarah doesn't talk." After a brief pause I replied, "you're right." And I have thought about that off and on over the past week. It is the first time he has pointed out to me what I already knew. I am not sure why it stuck with me. Is it because it made me sad that he had realized this about his twin? Is it because it's true? I have noticed that people try to prepare you when they are going to tell you something they think will hurt you. And as far as Sarah goes it would have to be something really out there to catch me off gaurd. I find myself assuring the teachers they can tell me what they see, and to please be honest , because they are not going to tell me something I don't know about my daughter. They may have a technical name for it but whatever it is I probably already knew it. But this did catch me off gaurd because it came from him. This caught me off gaurd because I wasn't in "here comes the bad news" mode mentally. I guess if I am totally honest with myself it took me by surprise because if he, a two year old (although he's brilliant I must say) is noticing then everyone else must be too and that makes me a little sad.