Originally Posted by Dude
This is why I tend to back away slowly when someone starts trying to tell me how smart they are. My experience has always been that someone who is really smart doesn't have to talk about it. People notice.

For example, we might meet some adults at the park, who observe DD and say, "She's really smart." They're not telling me anything I don't already know, but I'm certainly curious how they do, on account of my DD has been running around as a giggle-monster the whole time.

People know. That's why I say you apparently tell like you can tell how tall someone is.