 Arguments from concept grasp, again, typically appeal to the idea that there are rationality constraints on concept attributions. As noted in the discussion of ME normativity, the question has been raised whether the idea that there are such constraints coheres with normativism. It has been suggested that this question is particularly pressing in the case of content. When it comes to meaning, there is the option of attributing meaning errors and explaining the error by appealing to the subject’s mistaken conception of the meaning of an expression, thereby rationalizing her reasoning and actions. In the case of concepts, this option is not available, since the error is said to occur at the level of content. It would either have to be argued that the error can be rationalized some other way, or the claim that there are rationality constraints on content attributions would have to be rejected (see Brown 2004, Wikforss 2015 and 2017).