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Write to me at author@ratnamchandra.com.

I welcome corrections that come with a source: a measurement I missed, a number I copied wrong, a theory stated more narrowly than its authors stated it. Please name the page and the line, and give the DOI.

Citation: Two-valuedness against measurement: nine spin-based theories set against published bounds. Final draft, 2026-11-07. Not peer reviewed. PDF sha256 af4b16507f77d7b6efa5f9ac2dc47e590adc041d6735f05b7c255a702e0c9194.