 Essentially, Peirce seems to be saying that triadic logic may be interpreted as a modal logic which is designed to deal with the indeterminacies resulting from that mode of being which Peirce has called “Potentiality” and “Real Possibility”. Under such an interpretation, dyadic logic becomes a limiting case of triadic modal logic resulting from removing indeterminacy and being determined entirely by “Actuality”. (Fisch &amp; Turquette 1966: 79)