authorship. I would also like to thank the other PPE tutors at
Balliol, who cheerfully took up the extra workload created by my
sabbatical, and those lecturers who took over much of my teaching
in the meantime: Paul Matthewson, Alan Bailey, and Sean Hall.

Many friends cheered me up through what was sometimes a very
difficult writing process. I would like to thank, in particular, every-
one who came on the New Year holiday to Amsterdam, Nilly
Sarkar and Patrick Costello, Miranda Fricker, Lucy Allwood, and
Susanne Bobzien. My partner, David Hesmondhalgh, provided
constant practical and moral support throughout, and helped by
laughing at my examples to put philosophy of the kind of which
this book is an instance into a helpful, if not always gratifying,
perspective. Jones and Smith, unfortunately, remain here and there,
taking arsenic and believing that p. Our daughter Rosa was born as
I was nearing completion of the manuscript--over a year ago
now--and Dave's support through the pregnancy and thereafter
have been invaluable.

It remains to thank my parents, Cathy and Ernie Steward, and
Dave's parents, John and Maureen Hesmondhalgh, for their will-
ingness always to be on hand, despite living many miles away, to
help out with Rosa in times of need. Their love and support is
gratefully acknowledged.

H. C. S.

Oxford, March 1996

-vi-