| Subject | English | Japanese |
| phys. | algebra of logic | 論理代数 (ronri-daisū) |
| comp., MS | Champion of Logic | 推理チャンピオン (Skill level in the Purble Place game. Once a Purble Place game is completed, a player gets a skill level rank assigned automatically by the game (based on number of guesses and hints during the game)) |
| gen. | logic of circumstances | 事態の論理 |