In this paper we discuss how academic writing is affected by epistemologic norms, especially in regard to the prohibition of contradiction and command to contradict. More precisely, we are interested in how these norms become apparent in guidelines for academic writing in university contexts. On an empirical level the paper analyses a corpus of 250 guidelines for the use of what we call coherence vocabulary. Furthermore, the text illustrates different forms of epistemological norms on the basis of qualitative text analysis. mehr