Yhprum’s Law is the opposite of Murphy’s Law (Yhprum = Murphy backwards). The simple formula of Yhprum’s Law is: ‘Everything, that can work, will work. It is attributed to Richard Zeckhauser, a professor for political economy at Harvard University: ‘Sometimes systems that should not work, work nevertheless.’
In 2006, Paul Resnick of the University of Michigan School of Information used this law to describe how intensive and seemingly altruistic participation by giving ranking is observed in the eBay system.
The Daily Omnivore 