Crikey, a brain!
Herewith the shocking evidence: actual picture proof that I both have a brain and, from those few splodges of colour there, that I sometimes even use it. Frightening, isn't it.
(The pics, by the way, come from a scan done as part of a stroke study, for which the researchers needed some normal brains. I did warn them about the inherent risk in using mine, but you just can't tell some people anything. I've learned that.)