This collection of essays focuses on three reasoning problems devised by Peter Wason - the selection task, the 2-4-6 task, and the THOG problem - which have had a considerable influence since their invention.; The reasons why people make so many errors in these seemingly simple tasks are still not fully understood. A variety of different theoretical perspectives have been used in trying to explain performance. These include the mental models approach, the pragmatic reasoning approach, and ...

Moduli theory is the study of how objects, typically in algebraic geometry but sometimes in other areas of mathematics, vary in families and is fundamental to an understanding of the objects themselves. First formalised in the 1960s, it represents a significant topic of modern mathematical research with strong connections to many areas of mathematics (including geometry, topology and number theory) and other disciplines such as theoretical physics. This book, which arose from a programme a...