This book explores the nature of scepticism, asking when it is legitimate, for example as the driver of new ideas, and when it is problematic. It also tackles how scepticism is related to contemporary social and political phenomena, such as fake news, and examines a radical form of scepticism which maintains that knowledge is impossible.

• Explores the nature of scepticism, asking when it is legitimate and when it is problematic
• Relates the topic of scepticism to important social trends, such as fake news, post-truth politics, and climate change denial
• Examines the philosophical arguments for a radical form of scepticism which maintains that knowledge is impossible
• Part of the Very Short Introductions series - over ten million copies sold worldwide