How Do You Define Arbitrary Perfection?

For me it’s rather trivially demonstrated by the fact that the walls of the foyer at our house are of a measurement so specifically and mindblowingly exact to the wheel-to-wheel length of my beloved 8Ball that she is held freestandlingly upright and perfectly in place when set between them, like so above (click for the bigger picture).

It doesn’t get more arbitrarily and/or coincidentally perfect than Foyer Bike Rack.