The intelligence of mules

It's a pity Stephen Fry made this comment about mules on Twitter today, especially after one had been obliging enough to carry him around.

Shame about the personality tho. Asininity and stubborness of their donkey genes mixed with the stupidity and angst of the equine. - Stephen Fry

When I saw the picture he posted of himself on the mule, I thought, "What a lovely mule!" and "Stephen looks a bit heavy for it!"

His comment reflects badly on him rather than mules, horses and donkeys. In fact mules have been found to be more intelligent than horses and donkeys.

Grumpy mules "highly intelligent"

Also, "equine" includes donkeys (Equus asinus).