Is Indirect Realism a Plausible Theory of Perception?

Is indirect realism a plausible theory of perception?
What are you directly aware of whilst reading this passage? Is it the paper and ink that form the words? Or is it something more abstract, something intangible, something internal?
According to indirect realism you are perceiving sense data, an 'idea' of this passage which is caused by the paper and ink, a mental image which resembles the material object's properties (primary at least). In the following pages I shall examine the arguments for and against such a theory of perception.
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