Forum:20th/21st century individuals

I'd like to get a ruling on a silly question. I'm wondering how best to apply Category:20th century individuals and Category:21st century individuals to people from the present day. For example, we've seen Sarah Jane Smith and Amy Pond living in both centuries on-screen, so they'd qualify for both categories. However, other individuals might qualify by sheer arithmetic. Should every 21st century individual from 2010 who is more than nine years old also be categorised a 20th century individual? Or should we keep things simple by limiting the categories to only the known data, by only using years actually portrayed on-screen? Rob T Firefly 18:00, May 11, 2010 (UTC)