A friend of mine told me about a hyper-intelligent duck that lived in the local park.

So I went to the park and soon found it reading a newspaper on a park bench. I asked it if it could explain quantum mechanics in 25 words or less. It thought for a minute before answering "Quack, quack, quack, quack!" and waddling away.

I then realised I was fooling myself all along - I was never going to even begin to understand anything like quantum mechanics.