Darryl Mathieson

The question of which mental functions require consciousness has recently come to the forefront because of its relevance for investigating animal consciousness. Finding out that an animal can perform a function associated with consciousness would count as evidence that it has conscious states. I argue that most of the empirical research interpreted as showing that some functions are associated with consciousness fails to show this. Instead, it merely shows that the relevant functions falter when based on degraded sensory signals—which is unsurprising. This issue hinders empirical research on the functions associated with consciousness. I explain how consciousness research can do better when investigating the functions that require consciousness. Until the relevant research is properly carried out, the presence of functions supposedly associated with consciousness in non-human animals should not convince the skeptics one bit.

In the science of consciousness, it’s oftentimes assumed that some creatures (or mental states) are more conscious than others. But in recent years, a number of philosophers have argued that the notion of degrees of consciousness is conceptually confused. This paper (1) argues that the most prominent objections to degrees of consciousness are unsustainable, (2) examines the semantics of ‘more conscious than’ expressions, (3) develops an analysis of what it is for a degreed property to count as degrees of consciousness, and (4) applies the analysis to various theories of consciousness. I argue that whether consciousness comes in degrees ultimately depends on which theory of consciousness turns out to be correct. But I also argue that most theories of consciousness entail that consciousness comes in degrees.