Amnesiacs reveal learning  in the absence of conscious remembering (acquisition of implicit knowledge)

But learning is limited (conditioning, perceptual-motor skills, priming ) and hyperspecific (context-dependent)

Amnesiacs reveal the function of the hippocampus: relational coding (binding) and consolidation (relating new information to old)

Prior knowledge may facilitate direct neo-cortical learning without the support of the hippocampus.