Notes on verification

Confirmed directly by the Supreme Court's own opinion in United States v. Causby (1946), corroborated by contemporaneous law journal analysis and multiple independent secondary sources including official case captions. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.9 clusters=4 claim_tier=notable | framework convergence=partial on The Supreme Court's official factual recitation in United States v. Causby serves as the ultimate documentary source that most later summaries derive from, though the law journal article from 1946 appears to be an independent contemporaneous account. (upstreams: United States v. Causby, 328 U.S. 256 (1946) Supreme Court opinion, Court of Claims findings of fact) — publishers independent, evidence may not be | kind=empirical eligibility=high]