Consciousness and higher-order thoughts

This paper argues that higher-order thought (HOT) models of consciousness face serious logical problems. The precise form these problems take varies depending on whether HOT models are understood as attempts to explicate the concept of (intransitive state) consciousness or as attempts to identify the property in virtue of which mental states are (intransitively) conscious. Understood in the former way, HOT models face a problem of circularity. Understood in the latter way, such models face a problem of regress.