Quote by 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."

"We cannot significantly assert or deny that the space and time of physics are the same as the space and time of sense experience."