“…Furthermore, the relationship between theory of mind (characterised by numerous concepts of reality and the existence of varying viewpoints apart from one's own (e.g., Flavell 2004, Wellman 1990) and language acquisition has been discussed intensively (e.g., Miller 2006, Milligan et al 2007. Specifically, children's abilities to use different epistemic markers are connected with the development of so-called modal language (including mental state vocabulary), belonging to an explicit theory of mind (Brooks, Meltzoff 2015, Moore et al 1990, Moore, Furrow 1991, Öztürk, Papafragou 2015, Papafragou 1998, Ruffman et al 2006, Taumoepeau, Ruffman 2016. However, only the children's understanding of the expression of the speaker's certainty and uncertainty has been examined (usually experimentally).…”