Hart offers a biologically based explanation for the use of an ‘epistemic positioning strategy’ aimed by speakers/writers at the legitimization of assertions, at persuading addressees of the veracity of the propositions, as a prior condition for the discursive legitimization of actions. This article focuses on various issues addressed in Hart’s article, among them the degree of commitment invoked in speakers/writers’ choice of epistemic stance expressions as legitimization strategies, as well as the expression of subjectivity/intersubjectivity in discourse and the degree to (...) which this involves responsibility and accountability for the speaker/writer. The article also provides an alternative proposal of the categories identified by Bednarek for the conceptual domain of evidentiality. (shrink)