Beweis der Gleichgewichtungsthese aus der Wahrscheinlichkeitskonzeption epistemischer Ebenbürtigkeit

In his book Meinungsverschiedenheiten (engl.: Disagreement) Marc Andree Weber defends a probability based conception of epistemic peerhood. Starting from this conception he proves the equal weight thesis, which prescribes that one should allocate the same weight to the beliefs of epistemic peers as to one's own beliefs. – In the present article I provide a much shorter proof. For that purpose I first formalize Weber's definition and thesis and I close the argumentative gap between the two of them by making relatively few additions. Toward the end, I will document the differences between Weber's proof and my proof and indicate the relevance of a second proof. No judgmental assessment will be sought.