Evidential Pluralism

Evidential Pluralism is a theory of causal enquiry. It holds that:

Establishing causation normally requires establishing that the putative cause and effect are both appropriately correlated and connected by an appropriate mechanism (‘object pluralism’);
So, evaluating causation requires scrutinising both association studies and mechanistic studies, where available (‘study pluralism’).

For a quick introduction to Evidential Pluralism and its applications, see

Focus on Evidential Pluralism, The Reasoner 15(6), 2021.

Evidential Pluralism is a collaborative research programme. Please get in touch if you’d like to be involved.

Evidential Pluralism applied to the social sciences

For overviews, see

Joe Jones, Alexandra Trofimov, Michael Wilde & Jon Williamson: Integrating diverse evidence using Evidential Pluralism, Centre for Reasoning report 23/01, 2023,

Alexandra Trofimov and Jon Williamson: Applying Evidential Pluralism to evidence-based law: EBL+, Jurisprudence. Doi 10.1080/20403313.2025.

Yafeng Shan and Jon Williamson: Applying Evidential Pluralism to the social sciences, European Journal for the Philosophy of Science 11(4):96, 2021. . doi: 10.1007/s13194-021-00415-z

Yafeng Shan and Jon Williamson: Evidential Pluralism in the Social Sciences, Routledge 2023. ISBN 9780367697228

See also ebpplus.org

Evidential Pluralism applied to medicine (EBM+)

For overviews of the EBM+ programme, see

Michael Wilde: The EBM+ Movement, The International Journal of Biostatistics 19(2): 283-293, 2023. doi: 10.1515/ijb-2022-0126

Veli-Pekka Parkkinen, Christian Wallmann, Michael Wilde, Brendan Clarke, Phyllis Illari, Michael P. Kelly, Charles Norell, Federica Russo, Beth Shaw and Jon Williamson: Evaluating evidence of mechanisms in medicine: Principles and procedures, Springer, 2018.

For some motivation for EBM+, see

Jon Williamson: Establishing causal claims in medicine, International Studies in the Philosophy of Science 32(1): 33-61, 2019. doi: 10.1080/02698595.2019.1630927