angry tapir writes: "Worried about logging into Facebook from a strange computer? There's now a way to get into the popular social network without entering your regular Facebook password. It's called a temporary password. To use it, users must list their mobile phone numbers with their Facebook accounts. They can then text a number from their phones and Facebook sends back a temporary password that is good for 20 minutes. The service will be available worldwide in the next few weeks."
Thus mathematics may be defined as the subject in which we never know
what we are talking about, nor whether what we are saying is true.
-- Bertrand Russell