If there is someone who you see pretty often, sometimes talk with them, but don't excactly talk to them, and don't know anything personal about them, could you still say you 'know' them?
Also, how large is the universe excactly 52 seconds after you answer? (I had a teacher who could easily answer anything like that, and he was teaching the 7-9th grades (I guess that could be called middle-school or secondary school)... He could've easily been a university teacher but decided to teach there
)
