Article published In: Journal of Argumentation in Context
Vol. 14:1 (2025) ► pp.40–60
Evaluating visual arguments in science
A case study of the Mars Phoenix lander’s images
Published online: 17 April 2025
https://doi.org/10.1075/jaic.23027.cso
https://doi.org/10.1075/jaic.23027.cso
Abstract
This paper explores a specialized application of visual argumentation within the domain of the natural sciences
and points out a broader conceptual problem regarding the testability of visual arguments. We highlight the methodological
problems of Leo Groarke’s Key-Component method that make it, in its current form, unreliable for use to test images’ argumentative
role. The main reason is that visual content is ambiguous and underdetermined, especially in a scientific context. Focusing merely
on visual features without the inclusion of verbal implicit premises poses a considerable challenge to reconstructing reliable
premise — conclusion structures.
We posit the necessity of advancing a more sophisticated framework specifically designed to evaluate visual
arguments systematically. We argue that images should be considered in a linked verbal — visual argument system in scientific
arguments, in which images and other evidence complement each other and jointly support a conclusion because relying solely on
visual evidence results in underdetermined inferences. The present paper exemplifies this issue through an illustrative case study
focused on images of the Mars Phoenix lander. The goal of the present study is twofold: to scrutinize the findings of visual
argumentation in order to extend its scope to the natural sciences, and to suggest methodological changes to the KC method to make
it more reliable.
Article outline
- 1.Introduction
- 2.Overview of visual argumentation
- 2.1Clashing views, changing problems
- 2.2The problem of reconstruction in visual argumentation and the KC method
- 3.Arguing scientific images
- 3.1Connecting science and technology studies and visual argumentation
- 3.2Reconstruction of the Mars Phoenix lander photo with the KC method
- 4.Summary
- Notes
References
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