 Some modify the omniscience thesis by claiming that, for some states, anyone who is in a state of that kind is justified in believing that she is, even if the thinker doesn’t actually have this belief (Peacocke 1999; Siewert 1998; Silins 2012; Smithies 2012). Horgan and Kriegel (2007) defend a modified omniscience thesis, based on the idea that sensations are by definition conscious.