The inference from converging experimental findings to a real causal relationship fails because the largest and most direct experiments (2023 Meta studies) found null effects, contradicting rather than supporting triangulation.

[UNDERCUT] The 2023 Meta experiments directly testing algorithmic versus chronological feeds found no detectable polarization effects. Triangulation requires convergence across studies; when the most methodologically rigorous studies find null effects, earlier smaller studies do not triangulate to a positive conclusion. Therefore, The inference from converging experimental findings to a real causal relationship fails because the largest and most direct experiments (2023 Meta studies) found null effects, contradicting rather than supporting triangulation. (Warrant: Inference to best explanation from converging evidence is undermined when the most direct and largest-scale tests of the hypothesized mechanism find null effects.)

• The 2023 Meta experiments directly testing algorithmic versus chronological feeds found no detectable polarization effects.
• Triangulation requires convergence across studies; when the most methodologically rigorous studies find null effects, earlier smaller studies do not triangulate to a positive conclusion.

These are challenges this argument’s reasoning pattern must still withstand. Answering them on Isonomia strengthens the argument.

• Is there a plausible alternative hypothesis that has not been considered or that would explain the facts at least as well?Open
• Could the facts be jointly explained by a conjunction of weaker causes rather than a single dominant H?Open
• Could the body of facts F itself be an artifact of selection, measurement, or reporting bias rather than a real phenomenon needing causal explanation?Open
• Does H actually explain the full body of facts F, or only a salient subset?Open
• Are the criteria used to judge H 'best' (scope, simplicity, mechanism, prior probability) appropriate for this domain, and are they applied consistently across the alternatives?Open

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No arguments cite this one yet — no one has built on or contested it. That is an absence of engagement, not a finding of soundness. Build on or contest it on Isonomia to change that.