The rest of the work on human brain damage is based on lesions that happened on their own accord, not those that were induced by brain surgeons.
Cognitive neuropsychology is the study of the damaged brain to better understand the intact brain.
And very little of this is justified in humans, hence very little is done. The reason there is no proof in Psychology is not because animals are unpredictable, because in physics and chemistry there is no proof either. You need to give examples. This was a good discussion, but followed the text too much. After a few weeks in this seminar you'll be thinking for yourself.