Derivation Web

source_f1d5ebc75d264fc9

# Alpha memo: cold water immersion bounded update

**Research question:** How far does the Receipt 1 signal transfer across the setting tested by Receipt 2?

**One-sentence alpha:** cold water immersion does not carry one stable direction across the two receipts; the supported alpha is an endpoint- and setting-bounded comparison rather than a universal benefit or harm claim.

**Receipt 1:** Cold-w…