Abstract
I propose that a certain four-valued logic should sometimes be used. It is to be understood that I use “logic” in a narrow sense, the old sense: a logic as an organon, a tool, a canon of inference. And it is also to be understood that I use “should” in a straightforward normative sense.
This paper and [5] are complements. There the introductory paragraphs and Part I are heavily abbreviated, while the more technical Parts 2 and 3 are given in full instead of, as here, barely summarized. Thanks are due to the National Science Foundation for partial support through Grant SOC71 03594 A02.
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Belnap, N.D. (2019). How a Computer Should Think. In: Omori, H., Wansing, H. (eds) New Essays on Belnap-Dunn Logic. Synthese Library, vol 418. Springer, Cham. https://doi.org/10.1007/978-3-030-31136-0_4
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