Are our hugely effective scientific laws – like equations we use in physics for precise prediction and technology – true? No. But they are not false either. They are not proper propositions in competition for truth or falsehood. What we find in physics texts and articles are not well-formed formulae but equations and ‘principles’ without, e.g., quantifiers and ‘ceteris paribus’ conditions included. Nor, I shall argue, can they be turned into proper propositions and still do all the jobs we require of them. They are rather materials we have learned how to use to build models and claims that are not only candidates for truth but, in any common sense of the word, are true. We are artful modelers, and we have insufficient reason to think it could ever be different. I urge that, as good empiricists should, we take successful scientific practice as our guide to what the world is like. Our best bet then about Nature is that she is not in the business of following out some laws writ in heavenly books any more than we are. She too is an artful modeler. The talk will defend the claim that we recoup the facts by artful modelling and explain what it means to claim that that is what Nature does too.
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After the talks all are invited to socialise and continue discussion over drinks in the Ryle Room.
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