[2] In 1963 he was awarded the Magnus Schwerd Prize for outstanding achievements in mathematics at school.
On his 60th birthday in 2003 a Festschrift was produced in his honour called "Cold-blooded: Philosophy from a rational standpoint" ("Kaltblütig.
Philosophie von einem rationalen Standpunkt" edited by Wolfgang Buschlinger and Christoph Lütge, published by Hirzel Verlag, Stuttgart).
In 2004 he received the Eduard Rhein Foundation Cultural Prize for having laid down the “foundation of an evolutionary theory of knowledge and for his outstanding achievement in bridging natural sciences and the social and humanistic disciplines”.
He is a member of the Science Advisory Committee of the Gesellschaft zur wissenschaftlichen Untersuchung von Parawissenschaften (GWUP), a German-speaking organisation supporting scientific skepticism.