Constructive Set Theory/aczels Constructive Zermelo%e2%80%93fraenkel

Famous quotes containing the words constructive, set and/or theory:

    The measure discriminates definitely against products which make up what has been universally considered a program of safe farming. The bill upholds as ideals of American farming the men who grow cotton, corn, rice, swine, tobacco, or wheat and nothing else. These are to be given special favors at the expense of the farmer who has toiled for years to build up a constructive farming enterprise to include a variety of crops and livestock.
    Calvin Coolidge (1872–1933)

    The poverty of our century is unlike that of any other. It is not, as poverty was before, the result of natural scarcity, but of a set of priorities imposed upon the rest of the world by the rich. Consequently, the modern poor are not pitied ... but written off as trash. The twentieth-century consumer economy has produced the first culture for which a beggar is a reminder of nothing.
    John Berger (b. 1926)

    Won’t this whole instinct matter bear revision?
    Won’t almost any theory bear revision?
    To err is human, not to, animal.
    Robert Frost (1874–1963)