“[I]t is an objective fact whether a certain experience is pleasurable or unpleasurable, and relatedly whether a particular conscious individual is presently experiencing something pleasurable or painful. It is an objective fact, so we may put it, about a subjective state.”

— Timothy Sprigge, Is the esse of Intrinsic Value percipi?: Pleasure, Pain and Value (Philosophy, the Good, the True and the Beautiful, 2000, p. 123)