English edit

Etymology edit

proto- +‎ thetic

Noun edit

protothetic (plural protothetics)

  1. (philosophy, logic) A particular theory of the relationships between propositions
    • 2015, Pierre Joray, “Teaching Leśniewski's Prothetic with a Natural Deduction System”, in arXiv[1]:
      In this paper, we present a system which is a natural deduction (in Fitch-Ja\'skowski's style) version of protothetic.