Quote by Quine, Willard Van Orman
"The man-made and the natural are not really distinct categories—everything is ultimately natural."
More from Quine, Willard Van Orman
"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."