 Schaffer argues that sentences like (48a–c) are not equivalent. According to Schaffer’s account, assuming the cat is indeed on the mat, to know where the cat is is to know that the cat is on the mat relative to the question ‘Where is the cat?’, whereas to know what is on the mat is to know that the cat is on the mat relative to the question ‘What is on the mat?’. Schaffer argues, in the end, that all knowledge, including knowledge-that, is question-relative. Aloni and Égré (2010) offer a different take on Schaffer’s Problem of Convergent Knowledge, arguing that it reveals a pragmatic ambiguity concerning what it means to know the answer to a wh-question. 