The disputes about whether attention is sufficient for consciousness, necessary for consciousness, or both, are related to questions about attention’s metaphysics. The claim that attention is not sufficient for consciousness is typically made as part of a defence of the idea that attention and consciousness are underpinned by two distinct brain processes, which can occur independently (see, e.g., Koch and Tsuchiya, 2007). The claim that the things to which we attend are a proper subset of the th