Remark. This provides an intuition for duploids. We need copy-discard multicategories to define two kinds of composition: clones identify them and can be seen as a degenerat ecase.
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Vincent Moreau, in personal communication, noticed that the fact that one of the compositions is non-unital and the other non-associative prevents us from attempting a duploid.
Tags: duploid, copy-discard multicategory.