built them up we built a model that was useful in its own right it helped explain some things about neuroscience more or less along the way without having to fit anything and then by looking at it we can make predictions which then led to experiments that we could do to maybe learn something new about how the brain is organized corollary discharged we can't tell and in an electrophysiology we just have some Tet Rhodes recording from some places and we're not exactly sure where we can't reconstruct the image to fully