The basis of intercerebrality is solid. Although brain areas of two rats never have the same extension, they nevertheless obey to the same anatomical and physiological distribution. Each rat shares similar or at least exchangeable information on the environment, congeners, enemies. Especially, all the rats part of common experience that built-advised for them a medium, congeners, according to their brains hard Building Information >> soft >> soft and hard to clean living brains. This does not prevent that the inside of the case there is frequently mutants (genetic) for conduct even the most basic (sleep, phototropism, coupling, etc.) as Seymour Benzer team the showed up in the flies, which does not yet have a real brain, but only a set of very effectively coordinated ganglia