Relearning as a strategy

It means accepting that your knowledge of old subjects will decline and that there will be a period of hard effort before they're usable at their previous level.

• Relearning tends to be much faster than initial learning.
• Relearning is a form of spacing practice.
• Relearning prioritizes useful knowledge. If something is more useful, you'll find opportunities to practice it. Less useful knowledge will decay more.