129 hzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA ttp://dx.doi .org/10.17002/si l..67.202304.129 Emergence o f D i scours e Marli ers o f Uncertai nty i n En g li sh an d Korean an d t he ir Functi onal E xt ens i on: Grammati cali zati on and D i scours e-Co g ni ti ve Strat e gic Pers pecti ves* Seongha Rhee (Faculty o f Li beral Arts, Mahi dol Uni versi ty & Hankuk Uni versi ty o f Forei gn Studi es) Seongha Rhee (2023), Emergence of Di scoUI'S e Mar kers of Uncertainty in Engli sh and Korean and their F uncti onal Ext ensi on: Gramma ti cali zati on and Di scoUI'Se- Co gniti ve Strat egi c Perspecti ves. St udi es i n Li ngu i st i cs 67, 129-167. Korean and Engli sh have anumber o f di scourse markers (DMs) t hat signal t he speaker' s epi st emi c att itude o f uncert ai nty (Uncert ai nty DMs; UDMs). Engli sh UDMs develop fr om t hree maj or conceptual cat egori es, i .e., ment al predi cat es, sort al modi fi ers, and lexemes denot i ng cert ai nty . Korean UDMs develop fr om fi ve maj or conceptual cat egori es, i .e., quest i ons, i nt errogat i ves, mini mi zers, sort al modi fi ers, and cont i ngency connect i ves. Even t hough t he two languages have only one conceptual cat egory , i .e., sort al predi cat es, as a common conceptual source, each source cat egory member i n t he two languages undergoeschange t hat contri but es t o t he 'uncert ai nty ' semant i cs t hrough select i ve focus on di verse aspect s o f t he meani ng of t he source lexemes and expressi ons. This paper * Thi s work was support ed by by the Mi ni s t ry of Educat i on of t he Republi c of Korea and the Nat i onal Research Foundat i on of Korea (NRF-2019S1A5A2A 01035042).