This paper draws on the resources of computational neuroscience (an account of active inference under the free energy principle) to address Bas van Fraassen's bad lot objection to the inference to the best explanation (IBE). The general assumption of this paper is that IBE is a finessed form of active inferences that self-organising systems perform to maximise the chance of their survival. Under this assumption, the paper aims to establish the following points: first, the capacity to learn to perform explanatory inferences comes with evolutionary privileges; second, adaptive actions guide beliefs and beliefs are action-oriented; and third, IBE is not inconsistent with (approximate) Bayesianism but plays a heuristic role to it.
K E Y W O R D Sbad lot objection, free energy principle, inference to the best explanation
| INTRODUCTIONThis paper canvasses a reply to the notorious bad lot objection to the inference to the best explanation (IBE). The bad lot objection challenges the grounds for assuming that the best (or the true) hypothesis is indeed among the ranked candidates (van Fraassen, 1989, p. 142 ff). The topic is still at the centre of scholarly attention (Dellsén, 2017a(Dellsén, , 2021 Prasetya, Forthcoming;Schupbach, 2013;Tesic et al., 2017). The time seems ripe to reap the philosophical fruits of the cognitive sciences and use them to cook a concrete answer to the bad lot objection. Motivated in this fashion, the paper argues that the natural (abductive) process of ranking the available hypotheses would, by the same act (i.e., active inferential processes), pick up a lovely/likely enough hypothesis. 1 To achieve its goal, the paper draws on the scientific notion of 'active inference' under the free energy principle (FEP) to reinforce three reactions to the bad lot objection. These reactions-dubbed respectively 'privilege', 'force majeure' and 'retrenchment'-have been anticipated (and then ruled out) by Bas van Fraassen (van 1 We do not elaborate on the distinction between loveliness and likelihood in this paper. Suffice to say that, aside from likeliness of theories, Lipton's account of IBE also considers inferential virtues of loveliness-for example, precision, mechanism, unifying power, scope, simplicity, fertility or fruitfulness (Lipton, 2004, p. 122). For an explanation to be the best one, it should be picked up by both criteria of likelihood and loveliness.