In 1989 Hans Albert retired from active service as Professor Emeritus but continued writing books and giving lectures at many universities, such as the 1990 lectures at the University of Graz on Critical Rationalism, the 1995 'Walter Adolf Lectures' at the Hochschule St. Gallen, and the 1998 Wittgenstein-Lectures at the University of Bayreuth (with Prof. Rainer Hegselmann) about Critical Rationalism.
