So, for example, what you find is that they're a number of features are detected by the feature demons, such as straight lines, which are either vertical, horizontal, at an angle, angles that intersect at ninety degrees, half circles, small circles, so they it was hypothesised that there were a number of feature detectors that erm were detecting features early in the pr the perception process  When these features were detected or, well when these features were detected, this information fed into cognitive demons which started to respond.