 Reid offers one further criticism of the RTM.  He notes the structural similarity between the RTM and the representational theory of perception.  He claims that Hume followed the logic of the view that the only objects that are truly given in perception are ideas, that all we ever experience are representations, to its natural conclusion: all we can have knowledge of are our ideas.  If there is any single lesson taught by the history of epistemology, it is that there are no successful arguments that have only premises about the contents of our ideas and which conclude with propositions about physical objects.  The so-called Theory of Ideas in the realm of sense perception brings with it skepticism about the physical world.