Consciousness as Differentiation

A system can discriminate a million shades of colour and be no more advanced, in the relevant sense, than one discriminating two. What raises a mind's level, this chapter argues, is a categorically new kind of distinction, and the chapter derives the ladder of kinds, from thermostat to self-conscious moral agent, from the single principle the book's foundation supplies: content requires contrast. A thermostat detects temperature differences. An animal that detects the difference between its own states and the world's has crossed a categorical boundary no accumulation of thermostat-distinctions crosses. A creature that detects distinctions among its own detections, that can attend to its own experience, has crossed another. The resulting hierarchy is ordered by structural containment, and the chapter uses it to separate two axes that every mental state divides into: content, what is detected, and direction, the felt pull toward or away from it. The second axis, valence, is where mattering lives, and the book's ethics will be built on it. The chapter also names a question it argues is prior to the famous 'hard problem' of consciousness: the boundary question. Of all the physical events occurring in a brain, which ones constitute experience, and what distinguishes them from the billions that do not? Any theory of consciousness owes an answer, and the chapter proposes structural criteria while being explicit about their status. The results here are graded as constructed, the best available positive account with live rivals, and the chapter constrains solutions to the hard problem while claiming to provide none. Four rival theories, higher-order accounts, global workspace, integrated information theory, and predictive processing, are reinterpreted within the framework. The chapter closes with an audit that later chapters depend on. It lists exactly which of its results the rest of the book uses, the two-axes architecture and the existence of valence and nothing else from its positive theory, so that a reader who rejects its more ambitious claims can confirm that the book's ethics and politics survive the rejection. This paper is Chapter 13 of Dyology: On Diversity and Equality; the book's ethics and politics draw on exactly two of this chapter's results, and the Premise Register shows which.