Empiricits eschew the notion of a priori (built-in, born-with) knowledge. "Radical reductionists" such as John Locke and David Hume "held that every idea must either originate directly in sense experience or else be compounded of ideas thus originating"; quoted from Quine reprinted in 1996 The Emergence of Logical Empriricism, Garland Publishing Inc. http://www.marxists.org/reference/subject/philosophy/works/us/quine.htm
