Learning: Varied (A → B → C →A)

The Illusion of Competence: Most people practice in "Blocks" (e.g., AAABBBCCC), mastering one thing before moving to the next. This feels easier but creates a false sense of mastery.
Short-Term RAM: When you repeat the same task (e.g., solving 10 similar math problems), your brain holds the solution in its short-term working memory. You aren't learning; you are just hitting "repeat." This leads to high immediate performance (89%) but terrible retention (20%) because the info never moves to long-term storage.
The Reality (The "Reload" Hypothesis): True learning requires Interleaving—mixing different tasks together (e.g., Shoot → Dribble → Pass → Shoot). By switching tasks, you force your brain to "dump" the previous solution and re-construct the motor program or formula from scratch for the next rep.
The Mechanism: Block practice teaches you how to execute a skill. Varied practice teaches you when to use it. By constantly switching problem types, you train the brain to identify subtle differences (Generalization), building a robust "schema" that works in new, unseen situations.