The claim that short-term experiments provide conservative lower-bound estimates of long-term effects is contradicted by the 2023 Meta experiments, which found null effects over a three-month window.

[REBUT] A three-month randomized experiment replacing algorithmic with chronological feeds found no detectable polarization effect. If short-term effects were lower bounds that compound over time, a three-month experiment should detect effects larger than one-month experiments, not null effects. Therefore, The claim that short-term experiments provide conservative lower-bound estimates of long-term effects is contradicted by the 2023 Meta experiments, which found null effects over a three-month window. (Warrant: The compounding assumption underlying the lower-bound claim is empirically falsified when longer experimental windows show null rather than larger effects.)

• A three-month randomized experiment replacing algorithmic with chronological feeds found no detectable polarization effect.
• If short-term effects were lower bounds that compound over time, a three-month experiment should detect effects larger than one-month experiments, not null effects.

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

• Is the literature really agreed that defects of kind K bias inferences in direction B, or is the bias direction itself contested?Open
• Does study S actually have defect D, or is the description of S inaccurate?Open
• Is the expected magnitude of the bias from D large enough to overturn S's reported effect, or is the effect robust to plausible bias corrections?Open
• Has S (or a follow-up study) performed a robustness check or sensitivity analysis that addresses defect D directly?Open
• Is this critique applied consistently — i.e., would it apply to studies on the other side of the debate that share the same defect kind K?Open
• Is H supported by independent studies that do not share defect D, such that S's defect does not undermine H itself?Open

No one has cited this argument yet.

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.