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This article defends two theses: that a mental state is conscious if and only if it has phenomenal character, i.e., if and only if there is something it is like for the subject to be in that state, and that all state consciousness involves self-consciousness, in the sense that a mental state is conscious if and only if its possessor is, in some suitable way, conscious of being in it. Though neither of these theses is novel, there is a dearth of direct arguments for them in the scholarly literature and the relationship between them has so far gone underrecognized. This article attempts to remedy this lack, advancing the claim that if all conscious states have phenomenal character, then all state consciousness involves self-consciousness.

The so-called 'higher-order thought' (HOT) theory of consciousness says that what makes a mental state conscious is the presence of a suitable higher-order thought directed at it (Rosenthal, 1986; 1990; 1993; 2002; 2004; Gennaro, 1996; 2004). The HOT theory has been or could be attacked from two apparently opposite directions. On the one hand, there is what Stubenberg (1998) has called 'the problem of the rock' which, if successful, would show that the HOT theory proves too much. On the other hand, it might also be alleged that the HOT theory does not or cannot address the so-called 'hard problem' of phenomenal consciousness. If so, then the HOT theory would prove too little. We might say, then, that the HOT theory is arguably between a rock and a hard place. In this paper, I critically examine these objections and defend the HOT theory against them. In doing so, I hope to show that the HOT theory, or at least some version of it, neither proves too little nor too much, but is just right. I also show that these two objections are really just two sides of the same coin, and that the HOT theory is immune from David Chalmers' (1995; 1996) criticisms of other attempted reductionist accounts of consciousness.

I begin by considering Ned Block's widely accepted distinction between phenomenal and access consciousness. I argue that on Block's official characterization a mental state's being access conscious is not a way the state's being conscious in any intuitive sense; that if phenomenal consciousness itself corresponds to an intuitive way of a state's being conscious, it literally implies access consciousness; and that Block misconstrues the theoretical significance of the commonsense distinction. These considerations point to the view that mental states' being conscious consists in their being accompanied by occurrent, assertoric thoughts to the effect that one is in the state in question: what I have elsewhere called higher- order thoughts (HOTs). After outlining the model, I sketch theoretical advantages having to do with introspective consciousness, the relationship between consciousness and speech, and the metacognitive phenomenon known as feeling-of-knowing judgments. I conclude by showing that the HOT model does justice to phenomenal consciousness: Sensory states are not all conscious, and HOTS explain why there is something it is like to be in those which are.

One of the promising approaches to the problem of consciousness has been the Higher-Order Monitoring Theory of Consciousness. According to the Higher-Order Monitoring Theory, a mental state M of a subject S is conscious iff S has another mental state, M*, such that M* is an appropriate representation of M. Recently, several philosophers have developed a Higher-Order Monitoring theory with a twist. The twist is that M and M* are construed as entertaining some kind of constitutive relation, rather than being logically independent of each other. We may call this the Same-Order Monitoring Theory of Consciousness. In this paper, I discuss the nature of the Same-Order Monitoring Theory and argue for its superiority over the more traditional Higher-Order Monitoring Theory.

Thomas Reid claims to share Locke's view that consciousness is a kind of inner sense. This is puzzling, given the role the inner-sense theory plays in indirect realism and in the theory of ideas generally. I argue that Reid does not in fact hold an inner-sense theory of consciousness and that his view differs importantly from contemporary higher-order theories of consciousness. For Reid, consciousness is a first-order representational process in which a mental state with a particular content suggests the application of recognitional concepts in forming beliefs or judgements to the effect that one is currently undergoing a state with that content. I take up the question of whether Reid's theory leads to a regress, and I argue that while the regress cannot be eliminated, it is mitigated by the non-hierarchical nature of Reid's theory of mind.

In this commentary I criticize David Rosenthal’s higher order thought theory of consciousness (HOT). This is one of the best articulated philosophical accounts of consciousness available. The theory is, roughly, that a mental state is conscious in virtue of there being another mental state, namely, a thought to the effect that one is in the first state. I argue that this account is open to the objection that it makes “HOT-zombies” possible, i.e., creatures that token higher order mental states, but not the states that the higher order states are about. I discuss why none of the ways to accommodate this problem within HOT leads to viable positions.

David Rosenthal and Fred Dretske agree that creature consciousness should be used to give a reductive explanation of state consciousness. They disagree, however, over what type of creature consciousness will do the job. Rosenthal, defending a higher-order thought (HOT) account, argues that higher-order creature consciousness is what is needed. Dretske, defending a first-order (FO) account, argues that first-order creature consciousness is what is needed. I attempt to advance this debate by presenting a case for a third creature-conscious account of state consciousness. what I call the same-order (SO) account. I show that bydefining a conscious mental state as a mental state whose possessor is conscious of what it represents, we are offered a unique creature-conscious account of state consciousness that avoids some of the problems that have plagued both the HOT and FO accounts.

According to the HOT theory of consciousness, a mental state is conscious just in case it is represented by an appropriate higher-order thought. Whereas according to the self-representational theory of consciousness defended by Kriegel, mental state M is conscious just in case it is a complex with suitably integrated proper parts, M1 and M2, such that M1 is a thought-like higher-order representation of M2, where M2 is either a representation of the world or a higher-order representation itself. According to Kriegel, conscious state M thereby “indirectly” represents itself. In this paper I raise two problems for Kriegel’s brand of self-representationalism. First, I argue that in avoiding the self-representationalist’s claim that a consciousness-conferring HOT must be suitably integrated with its target, the HOT-theorist is in a much better position to explain why consciousness arose. I then focus on Kriegel’s claim that conscious states represent themselves “indirectly”. Kriegel attempts to support this claim by appealing to what he regards as intuitive cases of indirect perceptual and pictorial representation. For example, Kriegel claims that in directly perceiving the front surface of an apple one indirectly perceives the entire apple itself. Cases such as this are supposed to provide intuitive support for the principle that if X represents Y, and Y is highly integrated into complex object Z, then X indirectly represents Z. I argue that we can explain what is going on in purported cases of indirect perceptual and pictorial representation without positing indirect representation.

In Thinking About Consciousness , David Papineau [2002] presents a criticism of so-called 'actualist HOT theories of consciousness'. The HOT theory, held most notably by David Rosenthal, claims that the best explanation for what makes a mental state conscious is that it is the object of an actual higher-order thought directed at the mental state. Papineau contends that actualist HOT theory faces an awkward problem in relation to higher-order memory judgements; for example, that the theory cannot explain how one could later recall an earlier experience that was not introspected. He argues that, on the HOT theory, we are even left with the absurd conclusion that the consciousness of, say, an earlier visual experience might even depend on the later act of memory. I show that Papineau's criticism of actualist HOT theory not only fails, but also that it seriously mischaracterizes and underestimates the theory. In particular, Papineau badly conflates the crucial difference between an introspective state (i.e., where a conscious HOT is directed at a mental state) and an outer-directed first-order conscious state (i.e., a case where one has a nonconscious HOT).

Following a short introduction, this chapter begins by contrasting two different forms of higher-order perception (HOP) theory of phenomenal consciousness - inner sense theory versus a dispositionalist kind of higher-order thought (HOT) theory - and by giving a brief statement of the superiority of the latter. Thereafter the chapter considers arguments in support of HOP theories in general. It develops two parallel objections against both first-order representationalist (FOR) theories and actualist forms of HOT theory. First, neither can give an adequate account of the distinctive features of our recognitional concepts of experience. And second, neither can explain why there are some states of the relevant kinds that are phenomenal and some that aren.