Yes Katie, that is a fact

There are nine million bicycles in Beijing,
That's a fact,
It's a thing we can't deny,
Like the fact that I will love you till I die.

We are twelve billion light years from the edge,
That's a guess,
No-one can ever say it's true,
But I know that I will always be with you.

- From Katie Melua's "Nine Million Bicycles"