 Now, here is a tricky question: is \(\varphi\) (“Ann believes that Bob’s assumption is wrong”) true or false? Paraphrasing Pacuit and Roy (2017:  Section 6),  suppose \(\varphi\) is true. So, what \(\varphi\) represents is true, that is, Ann believes that Bob’s assumption is wrong. Moreover, by belief introspection, she believes that “she believes Bob’s assumption is wrong”, that is, she believes Bob’s assumption. But the description of the situation tells us that Ann believes that Bob assumes \(\varphi\); then, in fact, Ann believes that Bob’s assumption is correct. Thus, \(\varphi\), “Ann believes that Bob’s assumption is wrong”, is false.