That is not something I have been able to work out. I have theories as to how this place works, but they are only theories.
[Draco] I feel the need to warn you. Please take some of what you hear with a grain of salt. This place is quite topsy turvy. For example, I am not yet twenty, but I know quite an awful lot about... your time, which is still a considerable time away from my own, given you mentioned having a wife.