Taken literally,"introspection"is often understood as an activity of"looking inward".Based on this understanding,philosophers have developed the inner sense theory of introspection,which explains introspection as internal perception of our own mental states.In contrast,Dretske in his"displaced percep-tion"theory takes introspection as a sui generis inference from"looking outward",and considers his account simpler and more reasonable than those theories about inner sense.However,not only does Dretske's introspective inference lack appropriate connecting beliefs,just as Aydede has criticized,but it also faces challenges from inner sense accounts and difficulties concerning the concept of inference.Therefore,Dresker's"displaced perception"theory as an inferential account of introspection is inap-propriate.