Quote by Quine, Willard Van Orman
"We should be suspicious of distinctions that cannot be operationally defined."
"We should be suspicious of distinctions that cannot be operationally defined."
"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."