Because the feeling of familiarity engendered in perceptually or conceptually facilitated processing or both is separable from actual memory retrieval, it must be meaningfully inferred as a consequence of past experience for it to be treated as diagnostic to judgment (Whittlesea, 1993). Stated simply, the process by which either, both, or neither forms of fluency are incorporated into familiarity judgments is, as Whittlesea (1993) says, highly sophisticated and wholly dependent on considerations of past experience and current processing.