....at least since the eye exam one where the zebra is told "Well, actually, that's an E, but we'll let you work."
Speaking as a quality engineer, the troubles that the NFL has been having with their replacement referees demonstrate a clear principle; there are a limited number of people capable of making football play calls reasonably accurately, and if they want to preserve some plausible integrity in their sport (that hasn't already been trashed by steroids, player arrests, and such), they seriously need to talk with the umpires' union.
The Famous Daily Dozen Exercises - In the 1920s and 30s, “Daily Dozen” was a household phrase. Some have even heard of it still today, although they may not know its provenance. The “Daily...
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