Objective information, intersubjectivity, and Popper's three worlds

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Does information exist in the world independently of brains and/or organisms that can interpret it? Answering this question is important for clarifying the theoretical foundations of the sciences of mind and brain. This chapter claims that Popperian objectivity-properly modified-is sufficient for the explanatory role that information often plays in these sciences without endorsing a problematic mind-independent notion of information. There exists, however, a tension between two Popperian views about objectivity: intersubjective agreement and World 3. In order to ground the objectivity of information-as it is used in the sciences of mind and brain, the relation between Popperian intersubjectivity and World 3 objectivity is examined in this chapter. The conclusion is that mind-dependent information can be objective when it is intersubjectively agreed upon, or, to put it differently, when "actualised" information in World 3 stands in the right relation to World 1.

Original languageEnglish
Title of host publicationKarl Popper's Science and Philosophy
EditorsDavid Merritt, Zuzana Parusniková
PublisherSpringer International Publishing
Number of pages15
ISBN (Electronic)9783030670368
ISBN (Print)9783030670351
StatePublished - 19 Jul 2021


  • Cognition
  • Function
  • Information
  • Intersubjectivity
  • Receiver
  • World 3

ASJC Scopus subject areas

  • General Physics and Astronomy
  • General Arts and Humanities


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