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In this paper we introduce multi-modal logics of minimal knowledge. Such a family of logics constitutes the first proposal in the field of epistemic nonmonotonic logic in which the three following aspects are simultaneously addressed: (i) the possibility of formalizing multiple agents through multiple modal operators; (ii) the possibility of using first-order quantification in the modal language; (iii) the possibility of formalizing nonmonotonic reasoning abilities for the agents modeled, baseddoi:10.1007/s10472-007-9046-5 fatcat:ep5dahgukjc4zeylwshemrpuvi