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A Tension Within Code Comparisons

Gueguen, Marie (2021) A Tension Within Code Comparisons. [Preprint]

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Abstract

It has recently been argued that robustness is not a sufficient criterion for deeming a cosmological simulation reliable. Such arguments, however, focused on a form of robustness called "convergence studies", which only constitute what Orzack and Sober (1993) refer to as "internal robustness", i.e., robustness found within a single model, as opposed to that obtained by comparing the predictions of distinct models. The questions thus arises: can a stronger form of robustness be found in cosmology and astrophysics? And how would it fare compared to convergence studies? Code comparisons, which compare the outputs of simulations based on different codes, seem at first sight a natural candidate for such a role. In this paper, I will argue however that a tension within code comparisons in astrophysics prevents them to constitute an instance of robustness analysis, for the effort to make targets comparable undermines the preservation of the diversity needed for robustness analysis.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Gueguen, Mariemgueguen@uwo.ca0000-0002-7752-4318
Keywords: philosophy of cosmology philosophy of astrophysics numerical simulation robustness code comparisons
Subjects: Specific Sciences > Physics > Astrophysics
General Issues > Computer Simulation
Specific Sciences > Physics > Cosmology
Depositing User: Dr Marie Gueguen
Date Deposited: 26 Jun 2021 03:51
Last Modified: 26 Jun 2021 03:51
Item ID: 19227
Subjects: Specific Sciences > Physics > Astrophysics
General Issues > Computer Simulation
Specific Sciences > Physics > Cosmology
Date: January 2021
URI: http://philsci-archive.pitt.edu/id/eprint/19227

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