"The search for scientific bases for confronting problems of social policy is bound to fail because of the nature of these problems... Policy problems cannot be definitively described. Moreover, in a pluralistic society there is nothing like the indisputable public good; there is no objective definition of equity; policies that respond to social problems cannot be meaningfully correct or false; and it makes no sense to talk about "optimal solutions" to these problems... Even worse, there are no solutions in the sense of definitive answers."
January 1, 1970
https://en.wikiquote.org/wiki/Wicked_problem