I know cultural references, I know how to hold a conversation in the language, and having seen her multiple times and having no drop in service..yeah, I can say I know her well enough to where she was comfortable enough to give me the range, and it's not over 30. So, assuming that she's lying, the shows and music she grew up listening to are indicative +/- 5 years. Benefits of knowing the culture, speaking the language, and not making false assumption based on feelings