Full Idea
The Paradox of the Preface is an apology, that you are committed to each proposition in the book, but admit that collectively they probably contain a mistake. There is a contradiction, of affirming and denying the conjunction of propositions.
Gist of Idea
Preface Paradox affirms and denies the conjunction of propositions in the book
Source
JC Beall / G Restall (Logical Pluralism [2006], 2.4)
Book Reference
Beall,J/Restall,G: 'Logical Pluralism' [OUP 2006], p.16
A Reaction
This seems similar to the Lottery Paradox - its inverse perhaps. Affirm all and then deny one, or deny all and then affirm one?