Work (physics) Let's Make a Deal : Monty Knows Happy wedding anniversary in June 2021 to my aunt Marrion and Uncle Joe Hirsch, cousins Lilly and Tom Schaffer and aunt Martha and uncle Mike Goodwin. Good job handling those wedding contracts with your Reptilian brains plus mammalian neocortex! Monty Hall problem Hall's marriage theorem Lability Marx Brothers ' 1935 movie A Night at the Opera , in which Groucho Marx attempts to explain the intricacies of a business contract to Chico Marx . When Groucho mentions the "sanity clause", Chico responds, "You can't fool me. There ain't no sanity clause !" In mathematics, the marriage theorem may refer to: Hall's marriage theorem giving necessary and sufficient conditions for the existence of a system of distinct representatives for a set system, or for a perfect matching in a bipartite graph The stable marriage theorem , stating that every stable marriage problem has a solution Snake h