I've got myself a bit of a logic problem. Say you know a person who has an evil twin wandering around, only the twin isn't particularly evil so you can't really distinguish them via one of them laughing sinisterly and brandishing an axe covered in blood, only by little things like one of them utterly denying that they have done an action and claiming that their evil twin has done it all the time.

So, say you've got these twins wandering around and you want to identify them quickly so they can't keep blaming each other for stuff. I immediately asked one of the twins to tell me something that they knew that the other one didn't and of course, their rightful response was 'how the hell do I know what the other one doesn't know'. Good point. I toyed with giving one of them a passphrase and not the other one, but that runs the risk of the non-evil twin forgetting the passphrase by accident and being accused of being the evil twin - not good. The only other thing I can think of to do to identify them is to secretly splash one of them with paint and then look for that when I'm talking to them. The downside of that approach though is that I'd have to do this daily and still go through the effort of working out whether it's the evil or non-evil twin I've managed to tag. And if it's a jacket or something, there's still the risk that the other twin will come along, pick it up and start wearing it.

I'm determined to find a system though. All suggestions welcome for efficient evil twin identification (and perhaps a system that also works for people with split personalities as well).

Do fish drink?
...Well apparently freshwater fish do not have to drink, they just absorb the water through their skin. Salt water fish however, do have to actively drink because they are losing water through their skin.

So the answer is yes, *some* fish drink.

Now if someone can just tell me if frogs have wishbones...

You know how tradionally dogs are meant to pee against something (if they are boys)? You know, cock a leg against a tree or a lamppost. Well today I saw a boy dog cock a leg and pee into midair, nowhere near anything, it looked most perculiar. Either it was actually peeing against an extrusion from a parallel dimension into our own, one that can only be seen by dogs (and in an infinite universe such things are possible) or it really was at face value in which case good on the dog for trying something new. Mind you, it did pee into the wind, something most kids figure out pretty young, but maybe it'll figure it out eventually. Indeed maybe I have witnessed the start of a new evolutionary branch of dogs - all they need is a few millions years to hone their technique. And goodness knows what implications what that has for the trees and the lampposts. Anyway, back to my walk in the park...