Whenever I think there's a perfect pattern, further reading and study reveal an exception.

NPR: Utterly Humbled by Mystery

This is a perfect fact pattern for a solid family limited partnership.

FORBES: Family Limited Partnerships Require Good Planning and Execution

Any deviation from perfect repetition in such a pattern is noticed easily.

ECONOMIST: Come up and see my etchings

The pattern isn't perfect.

WSJ: A Buy Signal for Commodities