Lisa Doerksen

The notion of subjective indistinguishability has long played a central role in explanations of the force of Cartesian sceptical hypotheses. I argue that sceptical hypotheses do not need to be subjectively indistinguishable to be compelling and I provide an alternative diagnosis of their force that explains why this is the case. My diagnosis focuses on the relation between one’s experiences and third-personal accounts of the circumstances in which these experiences occur. This relation is characterized by a distinctive gap that leaves room for questions about the nature of one’s circumstances, providing sceptical hypotheses with a foothold. I argue that this gap lends sceptical hypotheses their force and renders the stipulation of subjective indistinguishability unnecessary.

Thinking about oneself as a subject leaves unanswered fundamental questions about one’s identity as an object: about which thing one is, about what kind of thing one is, and about whether one exists at all. I put forward a new way of thinking about these questions by outlining the subject-as-object problem, a problem for inquiry directed at oneself qua subject. I argue that the source of the problem lies in the relationship between a basic precondition for inquiry – that something be present – and a framework that enables us to conceive of ourselves as inquirers in an objective world – the framework of objectivity. Once the problem is recognized, we can explain why there is always room for questions about one’s identity in response to any account of oneself and one’s relation to the world.