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No part of any contribution may be reproduced in any form without permission, except for the quotation of brief passages in criticism and discussion.

The German original was first published under the title: Bernhard Pörksen, Die Gewissheit der Ungewissheit. Gespräche zum Konstruktivismus, Heidelberg: Carl-Auer-Systeme 2001

English translation by Alison Rosemary Koeck and Wolfram Karl Koeck

Originally published in the UK by Imprint Academic

PO Box 200, Exeter EX5 5YX, UK

Originally published in the USA by Imprint Academic

Philosophy Documentation Center

PO Box 7147, Charlottesville, VA 22906-7147, USA

2013 digital version by Andrews UK Limited