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Concept
Next due now
Question
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Swipe: Left Next • Right Prev • Tap to Flip
Keyboard: Space Flip, E Easy, H Hard, A Again
Keyboard: Space Flip, E Easy, H Hard, A Again
Answer
Concept
Rate it to schedule
Explanation
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Choose: Easy (later), Hard (sooner), Again (very soon).
Hard cards appear more often.
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