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Rosanna has worked in Sheffield since 1999, after completing her PhD at Cambridge University and spending three years as a Research Fellow there. She spent five years as Head of the Philosophy Department in Sheffield and is currently Student Experience Lead in the School of History, Philosophy and Digital Humanities. 

Many of her main philosophical interests lie within the philosophy of logic and language and metaphysics, with Vagueness, Paradoxes, Logical Pluralism and Degrees of Belief featuring as recurrent themes. Her monograph, Theories of Vagueness (CUP 2000) explores the vagueness of natural language, asking such questions as what the logic and semantics of vague language are, and with what methodology we should construct and assess theories of vagueness. She defends a supervaluationist theory of vagueness.

Rosanna's current main project is on Vague Beliefs and Degrees of Belief. It argues that the category of beliefs is unavoidably vague, with many interesting and important types of situations and states which are candidates for borderline beliefs. Recognising and exploring this vagueness is key to tackling a range of issues regarding our doxastic states, our reasoning and our understanding of ourselves and others, Rosanna claims. The project grapples with topics within Epistemology and Formal Epistemology, Philosophy of Mind and Cognitive Science, Metaphysics and Philosophy of Language.

Postgraduate supervision

I would be happy to consider supervising PhD students in a range of areas including many topics within Philosophy of Language, Philosophical Logic and Metaphysics and others within Epistemology, Philosophy of Mind, Philosophy of Mathematics and Philosophical Methodology. 

I have previously supervised students on topics including Vagueness, Philosophy of Mathematics, Modality, Truth, Animal Minds, Conditionals, Externalism, Proper Names, the Metaphysics of Mind, Feminist Philosophy of Language, Social Epistemology and Philosophical Methodology. My students have gone on to academic positions across the UK, Spain, Germany, Canada, Mexico, France and China.