Today I approached a girl. 7/10. She knew me because a female friend of her told about me (i.e. she knew I'm a physicist). Then she began to tell me about how good she is in study, about how much she travelled for research, about many programming languages she learned, etc.

Now, I know she was bragging about it as I didn't explicitly screened her (though I maintained a superiority frame as almost all the crap she said is what any men would do in her mom bassement at high school). But just for reference: how do I know when a girl is qualifying herself and not just bragging?