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Use observable changes in attention, setup and preparation to decide when to pause a pool-practice block, without diagnosing a health problem or chasing a final success through increasingly unrecognizable attempts.

Fit one useful pool-practice task into shared table time by agreeing on turns, choosing a simple reset and leaving room for a considerate handoff instead of starting an open-ended drill.

Keep brief pool-practice notes that preserve the setup, intended task, observed results and next question without turning small sample counts or guessed causes into an ability rating.

Reduce a practice layout to the balls needed for one clear question, then add complexity deliberately without confusing a simplified exercise with a complete game or an official rules situation.

Compare what actually happened on two recognizable attempts before changing aim, separating the object-ball path, cue-ball finish and differences in setup instead of diagnosing a stroke from a miss alone.