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the claim

Human sleep cycles always begin with NREM stage 1

the verdict
COMMON KNOWLEDGE
Legacy classification; evidence review pending
Recorded sources
no sources on either side

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that human sleep cycles always begin with NREM stage 1?

Standard human sleep staging criteria dictate that non-rapid eye movement (NREM) sleep begins with stage 1 (N1), making this a matter of basic sleep architecture classification that requires no external citation.

Verdict: COMMON KNOWLEDGE · 0 sources for, 0 against · Last checked

The analysis

The claim states a definitional and observational fact about standard human sleep architecture: sleep onset into NREM is conventionally scored starting with N1 (stage 1). Because this is standard common knowledge regarding sleep staging rules, no citation is necessary and the balance verdict is COMMON_KNOWLEDGE.

What does the evidence say?

The claim states a definitional and observational fact about standard human sleep architecture: sleep onset into NREM is conventionally scored starting with N1 (stage 1). Because this is standard common knowledge regarding sleep staging rules, no citation is necessary and the balance verdict is COMMON_KNOWLEDGE.

Receipt History
first checked04 Aug 2026
judged → COMMON KNOWLEDGE · 9504 Aug 2026
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