Famous quotes containing the word require:
“My administration is pledged to follow the policies of Mr. Roosevelt in this regard, and while that pledge does not involve me in any obligation to carry them out unless I have Congressional authority to do so, it does require that I take every step and exert every legislative influence upon Congress to enact the legislation which shall best subserve the purposes indicated.”
—William Howard Taft (1857–1930)
“Let’s call something a rigid designator if in every possible world it designates the same object, a non-rigid or accidental designator if that is not the case. Of course we don’t require that the objects exist in all possible worlds.... When we think of a property as essential to an object we usually mean that it is true of that object in any case where it would have existed. A rigid designator of a necessary existent can be called strongly rigid.”
—Saul Kripke (b. 1940)