There's a linear algebra joke that can complement this one and goes like this:
Everything in the universe is either a duck or not a duck, but almost everything that is not a duck, if examined very closely or in really short time intervals, it behaves as a duck and you can apply duck methods to it.
There's a linear algebra joke that can complement this one and goes like this:
Everything in the universe is either a duck or not a duck, but almost everything that is not a duck, if examined very closely or in really short time intervals, it behaves as a duck and you can apply duck methods to it.