FUCHS, Peter, 2016. Der Fuss des Leuchtturms liegt im Dunkeln: eine ernsthafte Studie zu Sinn und Sinnlosigkeit. Weilerswist: Velbrück Wissenschaft. ISBN 978-3-95832-064-2. pdf 
The transition from reference to observation has emphasized the distinctions that are used to distinguish something from something else.
> Forms of form-finding are not only to be observed in the transdisciplinary field of supertheories of science. Wherever a form is observable whose function is to enable new forms, this is third-order observation. Art (where the term was apparently first used), but also religion/pastoral care and psychotherapy can be interpreted as forms of form-finding.