Philip K. Dick, "Man, Android, and Machine" in The Shifting Realities of Philip K. Dick (Lawrence Sutin, ed.) page 212

"Man" or "human being" are terms that we must understand correctly and apply, but they apply not to origin or to any ontology but to a way of being in the world; if a mechanical construct halts in its customary operation to lend you assistance, then you will posit to it, gratefully, a humanity that no analysis of its transistors and relay systems can elucidate. A scientist, tracing the wiring circuits of that machine to locate its humanness, would be like our own earnest scientists who tried in vain to locate the soul in man, and, not being able to find a specific organ located at a specific spot, opted to decline to admit that we have souls. As soul is to man, man is to machine: It is the added dimension in terms of functional hierarchy. As one of us acts godlike (gives his cloak to a stranger), a machine acts human when it pauses in its programmed cycle to defer to it by reason of a decision.