The analogy from partial news subscription interventions to full algorithmic effects fails because direct experimental tests of full algorithmic manipulation found null polarization effects.

[REBUT] Replacing algorithmic feeds with chronological feeds for three months during the 2020 election did not detectably change polarization despite substantially changing exposure patterns. Reducing exposure to like-minded sources on Facebook for three months did not reduce affective polarization. Therefore, The analogy from partial news subscription interventions to full algorithmic effects fails because direct experimental tests of full algorithmic manipulation found null polarization effects. (Warrant: When direct experimental tests of the full system find null effects, analogical reasoning from partial interventions to larger effects is contradicted by the available evidence.)

• Replacing algorithmic feeds with chronological feeds for three months during the 2020 election did not detectably change polarization despite substantially changing exposure patterns.
• Reducing exposure to like-minded sources on Facebook for three months did not reduce affective polarization.

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

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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.