Medium of exchange was observed as early as Oresme, Copernicus and then in 1558 by Sir Thomas Gresham, that bad money drives out good in any marketplace (Gresham's Law states "Where legal tender laws exist, bad money drives out good money"). A more precise definition is this: "A currency that is artificially overvalued by law will drive out of circulation a currency that is artificially undervalued by that law." Gresham's law is therefore a specific application of the general law of price controls. A common explanation is that people will always keep the less adultered, less clipped, sweated, less filed, less trimmed coin,
Blood Money (Breaking Bad) Hank’s care before he will consider Walt's argument, but is refused. Hank utters that he does not know him anymore, to which Walt replies, "If that's true, if you don't know who I am, then maybe your best course would be to tread lightly." The episode is dedicated to Kevin Cordasco, a sixteen-year-old fan of "Breaking Bad" who had met several members of the series' cast and crew; Cordasco died earlier in 2013 from neuroblastoma. This was the fourth dedication in the history of the series. The term "blood money" is a "double entendre": it means money obtained at the