噓には３つの種類がある。噓、真っ赤な噓、そして統計だ。
There are three kinds of lies: lies, damned lies, and statistics.

• Today
• Repcount: Number of reps you have done today
• Recall: Percentage of reps where you got a score of 3 or more
• Deletecount: Number of cards deleted today
• Addcount: Number of cards added today
• Duecount: (Approximate) number of cards due today
• Overall:
• Cardcount: Total number of cards in deck
• Repcount: All-time number of reps done across all cards in deck
• Interval: Length of time (=number of days) between the previous rep and the next scheduled rep for a given card, accumulated across the entire deck and then averaged out.
• Coverage: The percentage of cards in the deck that have been touched (had reps done on them) at least once
• Virgin cards: cards on which you have done no reps. These cards do not (cannot) contribute to coverage.
• Retention: Percentage of reps where you got a score of 3 or more (with the added assumption that virgin cards count as perfect retention, since, in theory (and usually in practice, too), you know the contents of a card when you create/enter it).
• (Not always visible) Trash bad cards: Selects a stratified sample of relatively mature non-virgin cards with exceedingly poor performance statistics (high lapsecounts and lapserates) and deletes them. Such cards are also known as “leeches”.
• (Not always visible) Cull virgin cards: Selects a stratified sample of the deck (i.e. a random sample of virgin cards) to send to the trashcan.
• It is a decimator function, reducing a maximum of 10% of the deck’s overall cardcount while only targeting virgins.
• Culling is useful for a deck that has become unmanageably overloaded with new cards (of dubious-to-ambivalent value) by auto-insertion/auto-addition technological conveniences such as deck import and multiple cloze deletion card creation. As the saying goes, “if in doubt, throw it out”.
• Note: unless otherwise stated, non-active (trashed or permanently deleted) cards are excluded from all stats