Big Questions Wiki di Wired: si parte da 42, chiaramente un numero non a caso. Un esempio?

Where are my keys?

Most brains can handle only five to nine short-term memories at once. Newer information – phone call! ice cream! – can bump a previous memory out of storage before it’s committed to long-term recall. Even worse, new memories tend to merge with permanent ones, muddying the recollection of ritual activities. Michael “Professor” Solomon, author of How to Find Lost Objects, says it’s easy to accidentally substitute one routine motion for another. So look for your keys where you normally put your wallet. If that fails, check the car, the sofa cushions, the door lock, and (duh) your pocket. You’re probably staring right at them.

Also, they will always end up being in the last place you look for them.