“…Prior research has demonstrated that individuals' argument skills do not develop spontaneously. Yet the factors that facilitate the development of argument skills remain underdetermined, including when people engage in thinking about or debating SSI (Asterhan & Schwarz, 2016;Henderson, McNeill, González-Howard, Close, & Evans, 2018;Iordanou & Constantinou, 2014, 2015Zeidler, Herman, & Sadler, 2019). To gain a fuller understanding of how argument skills develop, it has been suggested that we could pay closer attention to learners' epistemic thinking and its possible interaction with students' argument skills (Barzilai & Chinn, 2017;Iordanou, 2016a;Kuhn, Zillmer, Crowell & Zavala, 2013).…”