Re-learning is harder than new learning. In a population that can only do new learning by repetitive rote learning, re-learning is extremely difficult because old habits often need to be inhibited. Within ACL 4 Low, it is not recommended that relearning be used as this population lack the mental energy to inhibit their old habits. If re-learning is attempted, follow-up studies are required to ensure this method is cost effective as fading will likely occur over time.