集合を避けよ
Avoid sets
Effective learning: Twenty rules of formulating knowledge - SuperMemo
Q: What countries belong to the European Union (2002)?
A: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, the Netherlands, Portugal, Spain, Sweden, and the United Kingdom.
集合よりも列挙がよい、ただの列挙よりも下のような意味を含んだ覚えやすい列挙がよい
Well-formulated knowledge – Converting a set into a meaningful listing
Q: Which country hosted a meeting to consider the creation of a European Community of Defence in 1951?
A: France
Q: Which countries apart from France joined the European Coal and Steel Community in 1952?
A: Germany, Italy and the Benelux
......
Q: What was the historic course of expansion of the European Union membership?
A: (1) France and (2) Germany, Italy and the Benelux, (3) UK and (4) Ireland and Denmark, (5) Greece, (6) Spain and Portugal and (7) Austria, Sweden and Finland
加盟順に並べて（リスト化）、さらに加盟時期でグルーピングして一つ一つの情報をコンパクトにしている
チャンクを小さくしている(070333333→070-333-333のように)
意味も加わって覚えやすい