In a recent article, James Van Cleve joins a growing throng who have argued that Hilary Putnam's model-theoretic argument (and his "just more theory" response) begs the question against those who hold externalist theories of reference. Van Cleve has misinterpreted Putnam's argument. Putnam does not demand that the statements which make up the causal theory of reference must, themselves, do the reference-fixing. That would be question-begging. Rather, Putnam's argument is a "reductio", which can only be blocked with a theory of (...) reference that is both substantive and plausible. Putnam argues that there is no interpretation of "causality" that meets both conditions. (shrink)

According to the most popular theories of intentionality, a family of theories we will refer to as “functional intentionality,” a machine can have genuine intentional states so long as it has functionally characterizable mental states that are causally hooked up to the world in the right way. This paper considers a detailed description of a robot that seems to meet the conditions of functional intentionality, but which falls victim to what I call “the composition problem.” One obvious way to escape (...) the problem (arguably, the only way) is if the robot can be shown to be a moral patient – to deserve a particular moral status. If so, it isn’t clear how functional intentionality could remain plausible (something like “phenomenal intentionality” would be required). Finally, while it would have seemed that a reasonable strategy for establishing the moral status of intelligent machines would be to demonstrate that the machine possessed genuine intentionality, the composition argument suggests that the order of precedence is reversed: The machine must first be shown to possess a particular moral status before it is a candidate for having genuine intentionality. (shrink)

Virtual environments engage millions of people and billions of dollars each year. What is the ontological status of the virtual objects that populate those environments? An adequate answer to that question requires a developed semantics for virtual environments. The truth-conditions must be identified for “tree”-sentences when uttered by speakers immersed in a virtual environment (VE). It will be argued that statements about virtual objects have truth-conditions roughly comparable to the verificationist conditions popular amongst some contemporary antirealists. This does not mean (...) that the virtual objects lack ontological standing. There is an important sense in which virtual objects are no less real for being mind-dependent. (shrink)

This is an extended intellectual obituary for Hilary Putnam.

There is a dogma about metaphysical realism that is well nigh universal: "If one is a metaphysical realist about the external world, then one ought to be a semantic realist about external- world statements". I argue that this dogma should be rejected. It is possible for a metaphysical realist to be a "semantic dualist", holding that some middle- sized object statements receive a realist interpretation, but that most such statements require an antirealist interpretation. To show that a semantically dual language (...) is at least possible, I describe a possible world whose inhabitants speak a version of English that is syntactically dual. Further I argue that English in the "actual world" is itself semantically dual. (shrink)

Functional intentionality is the dominant theory about how mental states come to have the content that they do. Phenomenal intentionality is an increasingly popular alternative to that orthodoxy, claiming that intentionality cannot be functionalized and that nothing is a mental state with intentional content unless it is phenomenally conscious. There is a consensus among defenders of phenomenal intentionality that the kind of phenomenology that is both necessary and sufficient for having a belief that "there is a tree in the quad" (...) is that the agent be consciously aware of the meaning of "tree" and "quad". On this theory, experiences with a valence -- experiences like happiness and sadness, satisfaction and frustration -- are irrelevant to intentionality. This paper challenges that assumption and considers several versions of "valent phenomenal intentionality" according to which a capacity for valent conscious experiences is either a necessary or a sufficient condition for intentionality (or both). (shrink)

This paper has two main goals. First, it asks whether causality is an adequate foundation for those theories of cognition and consciousness that are built upon it. The externalist revolution has reconceived all three dimensions of cognition -- the semantic, the epistemological, and the mental -- upon a foundation of 'causal connections of the appropriate type'. Yet, these new theories almost completely ignore the long-standing controversies surrounding the very nature of causality, and the very real threat that 'causality' may be (...) ill-equipped to do the work required of it. The second goal is to defend a kind of causality, largely ignored, that is grounded in the phenomenally conscious states of cognitive agents. While it is popular to try to reduce consciousness to causality, this is a kind of causality that ultimately reduces to (phenomenal) consciousness. (shrink)

There is a long and storied history of debates over 'realism' that has touched literally every academic discipline. Yet realism- antirealism debates play a relatively minor role in the contemporary study of consciousness. In this paper four basic varieties of realism and antirealism are explored and their potential impact on the study of consciousness is considered. Reasons are offered to explain why there is not more debate over these issues, including a discussion of the powerful influence of externalist versions of (...) physicalist realism. Examples are given of approaches to consciousness studies that challenge contemporary versions of physicalist realism. (shrink)

The thesis of this dissertation is that "the realism-idealism debate" is both a theoretical and a practical dispute. The practical dimension has been largely ignored because the deficiencies in the theoretical positions have gone unnoticed. As theoretical doctrines, realism and idealism are best interpreted as semantic theories specifying the conditions in virtue of which our statements are true and false. As semantic doctrines, however, both realism and idealism are false. Neither semantic theory is consistent with other philosophical positions to which (...) most contemporary philosophers are committed. Once it is acknowledged that most of the participants to the realism-idealism debate are not actually committed to either semantic realism or semantic idealism, the doctrines of "practical realism" and "practical idealism" can be given the attention they deserve. ;In Chapter One it is argued that the only acceptable candidate for a theoretical construal of realism is "semantic realism" as applied to the class of statements that express our ontological commitments. Chapter Two defends this claim against contemporary physicalist realists who argue that realism is strictly an "ontological" doctrine. Chapter Three investigates two famous arguments that are generally thought to be the strongest justification for the truth of semantic realism. It is shown that whether or not they are sound, they do not actually argue to the conclusion that semantic realism is true. Chapter Four presents what I refer to as "particularist" refutations of semantic realism and semantic idealism. Neither semantic realism nor semantic idealism is consistent with our "considered convictions" about the meaning of our utterances and thus should be rejected. Finally, Chapter Five offers a preliminary account of "practical realism" and "practical idealism" and thus a new model for the interpretation of many types of realism-idealism discourse. (shrink)