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It does not seem unreasonable that Definition 2 can actually be satisfied. In virtue of being scientific explanations, the various modes of explanation might make common assumptions. E.g., one such assumption could be that the phenomenon is intersubjectively accessible, which might not be the case for certain aspects of conscious experience. Cf. <ref>Kleiner, Johannes. "Mathematical Models of Consciousness." Entropy 22.6 (2020): 609.</ref> for one way of conceptualising this. Since Definition 2 implies Definition 1, the same holds mutatis mutandis w.r.t. the latter.