Sentence:  If my account is correct, both archetypes and <WSD>ectypes</WSD> are 'real' insofar as they are composed of ideas of sensation. But I draw a distinction that Johnson does not acknowledge, viz., a distinction between ontological and epistemic <WSD>ectypes</WSD>. 
Meaning of the word marked with <WSD> tags:  A copy, usually contrasted with the original, or archetype.