Intelligence is not based upon the number of the brain's neurons, but how many connections we forge between them, linking one concept, one neuron with another, in a shimmering, self-aware neural net.
The only reality we can ever truly know is that of our perceptions, our own consciousness, while that consciousness, and thus our entire reality, is made of nothing but signs and symbols. Nothing but language.
Alan Moore (2005). Promethea #32. La Jolla: America's Best Comics
(Um bocadinho mais aqui: Promethea.)