• As a Pushout. We have an isomorphism
    natural in $X,Y\in \text{Obj}\webleft (\mathsf{Sets}_{*}\webright )$, where the pushout is taken in $\mathsf{Sets}$, and the embedding $\iota \colon X\vee Y\hookrightarrow X\times Y$ is defined following Remark 4.5.1.1.5.

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