The focus of the following comments will be mainly on Mugnai's characterization of Leibniz's ‘mild nominalism’. Mugnai seems to suggest that Leibniz might have had in mind an ontological commitment view. My idea is that such a construal can be somewhat misleading, for Leibniz's ontological cautiousness seems to stem, in an utter Ockhamistic spirit, from more general considerations about theory building and theory choice.