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Analyze what counts as scientific explanation (especially in multiverse contexts)

Develop a substantive, general account of scientific explanation adequate to multiverse reasoning—one that distinguishes explanatory strategies based on genericity/typicality from those invoking selection effects, and that guides confirmation in cosmology and other sciences.

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Background

Chapter 5 shows that multiverse-based explanations can proceed by making observed values generic/typical or by appealing to observation-selection (anthropic) effects; both strategies face conceptual and methodological challenges (measure, conditionalization, typicality) when applied to cosmological parameters.

The author flags the underlying question—what counts as explanation in these settings—as a central unresolved philosophical issue.

References

I especially emphasized three problems, prompted by the three multiverses in succession: What is a possibility? What is objective probability? And what is an explanation? These are difficult open problems in philosophy.

The Multiverse: a Philosophical Introduction (2505.23639 - Butterfield, 29 May 2025) in Chapter 6, opening paragraphs