"values of β may give rise to dom!"
summary
Tracing the literal origin of values of β may give rise to dom! from a Bell Labs photo‑typesetter prank into the v6 UNIX move program explains the claim; diagnosis shows ed’s syntax‑error ! and Doug McIlroy’s voice synthesizer as the tools that put it there; numbers anchor context: PDP‑11 hardware, ~10k lines in the System V6 kernel versus ~1.2M in modern Linux; demos cover moving “..” that triggers the message and why the kernel comment you are not expected to understand this survives.
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