Much more stimulating is the idea that everything cats (or humans for that matter) do is capable of logical explanation, if only we can find out how the behaviour mechanism operates.

The problem of how the digger wasp locates her home has a special place in the history of ethology: it was one of the first questions about behaviour mechanisms ever to be asked, and experimentally answered.

Papez therefore located the emotional behaviour mechanisms in the brainstem, especially in the mammillary bodies which, he believed, received sensory information via subcortical relay routes, and cognitive information from the cerebral cortex via the hippocampus and its subcortical projection system, the fornix.