Linguistic competence is, among other things, the cognitive ability of using words appropriately. Following this notion, being a competent language user cannot be merely simulated because pretending to use words appropriately already is using words appropriately. Since current AI already can use words appropriately it may be that AI already has linguistic competence instead of merely simulating it. However, in this article I argue that there is at least one domain of linguistic competence that can be simulated: grasping lexical effects. (...) Since grasping lexical effects presupposes an ability which AI lacks, namely feeling emotions, I argue that AI can only grasp the cognitive part of words but not their lexical effects. AI can only simulate to grasp lexical effects. Hence, lexical effects are a domain of linguistic competence AI cannot grasp. (shrink)