... Coherence measurement has been studied across various tasks, such as the document discrimination task (Barzilay and Lapata, 2005;Elsner et al., 2007;Barzilay and Lapata, 2008;Elsner and Charniak, 2011;Li and Jurafsky, 2017; Putra and Tokunaga, 2017), sentence insertion (Elsner and Charniak, 2011;Putra and Tokunaga, 2017;Xu et al., 2019), paragraph reconstruction (Lapata, 2003;Elsner et al., 2007;Li and Jurafsky, 2017;Xu et al., 2019;Prabhumoye et al., 2020), summary coherence rating (Barzilay and Lapata, 2005;Pitler et al., 2010;Guinaudeau and Strube, 2013;Tien Nguyen and Joty, 2017), readability assessment (Guinaudeau and Strube, 2013;Strube, 2016, 2018), and essay scoring (Mesgar and Strube, 2018;Somasundaran et al., 2014;Tay et al., 2018). These tasks differ from our task of intruder sentence detection as follows. ...