Quote by Quine, Willard Van Orman
"Universals are not needed if properties can be expressed extensionally."
"Universals are not needed if properties can be expressed extensionally."
"To be is to be the value of a variable."
"The problem of induction is to justify the rules by which we project unobserved instances from observed ones."
"Ontology is what one says exists; ideology is how one says one determines what exists."
"There is no fact of the matter about how language actually carves up the world."