Digital Companion to C. S. Peirce
1905 | Letters to Mario Calderoni | MS [R] L67:34-35
…Priman Tertianity is that Tertianity which consists in possibilities and Secundan Tertianity is that Tertianity which consists in brute, physical, or quasi-physical facts, while genuine Tertianity consists in rational truths and understandings. The genuine Tertian is again Primanly genuine, Secundanly genuine, and genuinely genuine Tertians, which last are signs.
‘Genuine Thirdness’. Term in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/term/genuine-thirdness, 05.06.2023.