Damage to the would be expected to impair instrumental learning. hypothalamus basal ganglia amygdala accumbens frontal cortex

Am certain that the damage to the basal ganglia would be expected to impair instrumental learning. The basal ganglia is a group of subcortical nuclei, of varied origin, in the brains of vertebrates including humans, which are situated at the base of the fore brain. They are strongly interconnected with the cerebral cortex, thalamus, and brainstem, as well as several other brain areas.

Yes he thought they should be left to chance why, because he thought that was the best thing to do