A second exobiologist, based on a review of his predecessor's drawings, argued that "smiley" should be be subdivided into two sub-concepts, "short-smiley" and "tall-smiley." He included specimens 2, 5, 7, 12, 13, and 14 under the first sub-concept, and all the others under the second sub-concept.

Before advancing to the next page, can you imagine some epistemological difficulties this alternative approach might present?

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