Conclusion
The Bakshy et al. study found that individual choice was the larger filter reducing cross-cutting exposure, with algorithmic effects being smaller than user self-selection.
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[UNDERMINE → premise #1] Bakshy et al. (2015) found that both algorithmic ranking and individual choice reduce cross-cutting exposure, but user choice was the larger filter. The study's own conclusion emphasizes that individual choice dominates algorithmic filtering in determining exposure patterns. Therefore, The Bakshy et al. study found that individual choice was the larger filter reducing cross-cutting exposure, with algorithmic effects being smaller than user self-selection. (Warrant: When a study finds that homophily effects exceed algorithmic effects, citing it as evidence that algorithms contribute 'beyond homophily' understates the relative magnitude of user self-selection.)
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- [DEFENSE-REBUT → v8cm4r] The original premise [1] stated that 'the algorithm contributed an independent additional reduction in cross-cutting exposure beyond homophily' which accurately reflects Bakshy et al.'s finding that both factors contribute. Establishing that algorithmic effects exist beyond homophily is sufficient to support the sub-claim that algorithmic effects are not fully explained by user self-selection. Therefore, The original argument correctly characterized Bakshy et al. as showing that algorithmic effects exist beyond homophily, not that they exceed homophily effects. (Warrant: When an argument claims that a factor contributes effects beyond a baseline, citing evidence that both the factor and the baseline contribute independently is accurate characterization, not misrepresentation.)contestsin a private deliberation
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