Recent literature argues that knowledge is not necessary for epistemically proper assertion. The most prominent competing account on the market imposes a weaker, rational credibility norm on assertion (RCNA); it is argued that (1) theoretical considerations, such as a priori simplicity, speak in favour of RCNA, (2) the weaker norm scores equally well when it comes to accommodating linguistic data and (3) KNA, as opposed to RCNA, has a hard time explaining cases in which assertions on lesser epistemic standings do not render the speakers subject to criticism. This paper tips the balance back in favour of the knowledge norm (KNA). I argue that: (1) the argument for the a priori simplicity of RCNA does not go through; (2) KNA scores better when it comes to accommodating linguistic data; (3) KNA and RCNA are shoulder to shoulder when it comes to explaining blamelessness of speakers in breach of the norm and (4) KNA fares better than RCNA in terms of a posteriori simplicity.