Willard Van Orman Quine

"To be is to be the value of a variable"

"The totality of our so-called knowledge or beliefs is a man-made fabric which impinges on experience only along the edges"

"No entity without identity"

"We can never do just one thing"

"The ontological commitments of a theory are what it presupposes as real"

"Clarity is hard to achieve"

"Questions of existence are questions of meaning"

"Meaning is what matters most in life"

"A contradiction is the surest sign of progress in thought"

"The pursuit of truth is endless"

"Language shapes our understanding of reality"

"Categories are human constructs"

"Indeterminacy is fundamental to language"

"Reference is not a simple relation"

"Understanding requires multiple perspectives"

"Logic is the foundation of rational thought"

"Empiricism must account for theoretical constructs"

"The web of belief forms a coherent whole"

"Analytic truths rest on meaning alone"

"Synthetic truths depend on experience"

"All knowledge is provisional"

"Identity over time requires careful analysis"

"Objects are bundles of properties"

"Quantification reveals ontological commitment"

"Truth conditions determine meaning"

"The world does not come pre-packaged with meanings"

"Clarity of expression is a moral virtue"

"Hidden assumptions undermine arguments"

"Concepts must be sharply defined"

"Vagueness has no place in serious discourse"