Abstract
There are a number of conflicting accounts of thought insertion, the delusion that the thoughts of another are inserted into one’s own mind. These accounts share the common assumption of _realism_: that the subject of thought insertion has a thought corresponding to the description of her thought insertion episode. I challenge the assumption by arguing for an anti-realist treatment of first-person reports of thought insertion. I then offer an alternative account, _simulationism_, according to which sufferers merely simulate having a thought inserted into their heads. By rejecting realism, the paper undermines a widespread explanatory framework that unites otherwise competing cognitive models of thought insertion.