[mynameishere]

Wow. Why did this get downmodded? Just curious. It's 100 percent apropos:

http://en.wikipedia.org/wiki/Duck_test

...used the phrase when he accused the Jacobo Arbenz Guzmán government of being Communist. Patterson explained his reasoning as follows:

Suppose you see a bird walking around in a farm yard. This bird has no label that says 'duck'. But the bird certainly looks like a duck. Also, he goes to the pond and you notice that he swims like a duck. Then he opens his beak and quacks like a duck. Well, by this time you have probably reached the conclusion that the bird is a duck, whether he's wearing a label or not."

[netcan]

Because this is the opposite. It's more like 'it drink water like a duck'