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When did Rembrandt get old? Such questions eventually lead us to the problem of vagueness. Williamson traces its history, questions conventional theories and defends the realist view that vagueness is a kind of ignorance.

The articles in this volume represent a part of the philosophical literature on higher-order logic and the Skolem paradox. They ask the question "what is second-order logic?" and examine various interpretations of the Lowenheim-Skolem theorem.

The concept of supervenience has become an object of philosophical investigation and controversy. This collection of essays explores such topics as: concepts of supervenience; supervenience for multiple domains; supervenience and metaphysics; and moral supervenience.

Brings together some of the most important research publications on the philosophical problem of consciousness. It includes a detailed introduction that surveys the leading issues in the current debate.