How do journalistic realities arise? Do journalists simply record events, or are they inevitably involved participants? Is objectivity a useful ideal or a myth? This essay offers a compact introduction to the discourse of constructivism, which is based on the assumption that absolute knowledge of truth is impossible, i.e. that we as human beings are inescapably biased. Following a general introduction to constructivist thinking, short interviews with principal thinkers of constructivism. Heinz von Foerster and Paul Watzlawick will highlight the main ideas of the approach.