Evolution is always quick to exploit a new idea, however, and this novel way of getting out of tricky situations was soon passed on to its offspring. It had a large number of offspring.

Given its new-found talent, this is not surprising.

The important gene was so incredibly dominant that now many cats have a bit of Schrodinger in them. It is characterised by the ability to get in and out of locked boxes, such as rooms, houses, fridges, the thing you swore you put it in to take it to the vet, etc. If you threw the cat out last night, and this morning it's peacefully asleep under your bed, it's a Schrodinger cat.

There is a school of thought which says there is in fact a sort of negative Schrodinger gene.

Whereas your full-blown Schrodinger can get in and out of the most unusual places there are cats, it has been pointed out, that would find it difficult to get out of a hoop with both ends open. These are the cats that you normally see, or rather, you normally hear behind fridges, in those dead little areas behind kitchen storage units, in locked garages and, in one case known to us, inside the walls (dreadful Edgar Allan Poetic visions led to a hole being knocked into the cavity a little way from the noise, which of course caused the cat—definitely a Real cat—to retreat further from the noise; it came out 24 hours later, dragged by the scent of a plate of food). But we are inclined to believe that this is not so and that these are merely examples of Offside (see “Games cats play”).

However, this ability, which most Real cats' owners will have noticed (and what about when they're missing for a couple of days, eh, and come back well fed? Have they just been panhandling round the neighbours, or did they nip along to next Wednesday to enjoy the huge relieved “welcome-back” meal you gave them?), leads on to interesting speculation about: