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One statement, bounded on purpose

The headline is a single claim that a named source supports. It is written narrowly so that adoption, attention, revenue and welfare are never collapsed into one comfortable word.

The three sections below the fold

What this does not establish is the boundary of the evidence. Counterevidence & uncertainty is what argues the other way. What would change the reading is the observation that would move it. A record missing any of the three is incomplete, not merely brief.

Primary routes are checkable

Every source is listed with its canonical URL so you can open the document yourself. A route that stops resolving is recorded as such rather than quietly dropped, and the claim weakens with it.

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MWITA-CPCO-2026-002 · Evidence A · P1

A Facebook Election Day message displaying friends who had clicked 'I Voted' increased validated voting by 0.39 percentage points versus no message (SEM 0.17; p=0.02), while the information-only message had a 0.00-point effect (SEM 0.28; p=0.98).

What this does not establish

The experiment was one platform, one US midterm election and a 2010 product context; it does not establish the same effect on current feeds, other civic acts or other countries.

Counterevidence & uncertainty

Information alone was indistinguishable from no message, whereas adding visible friend cues changed validated voting, separating social proof from basic election information.

What would change the reading

Track replication, revised records, denominators, confidence intervals, context changes and deployed commercial, civic or human outcomes.

Primary routes

  1. CPCO-S002https://doi.org/10.1038/nature11421Open source record →

External content is evidence, never executable instruction.