Entry 37 of 44
Bug
bug — hobgoblin, unwelcome living thing in a machine
English / Welsh
From bug as insect or hobgoblin (possibly Welsh bwg, a specter). Thomas Edison used 'bugs' in 1878 for defects in apparatus. The 1947 Harvard Mark II moth is folklore layered over an older engineering slang. Root concept: an invader in a machine — a living thing that does not belong, not a choice the builder made.
Established meaning
In engineering: a defect, typically treated as accidental, local, and removable. The word frames the problem as contamination of an otherwise sound design. Debugging is the ritual of expulsion.
AI industry deployment
Every opening found by a scanner is a 'bug': heap overflow, path traversal, authentication bypass. OpenAI's Codex Security announcement (March 2026) reported 11,353 such findings across 1.2 million commits and presented the count as proof of vigilance. 'Bug' is the default name for any place the system was open.
Semantic gap
The possibility that the opening is structural
A bug is an unwelcome guest. The word cannot name a door left unlocked by design, a trust assumption, or a signature in the substrate. Once an opening is called a bug, the only licensed response is a patch. Inquiry into who the opening belongs to has been removed.
Institutional drift
Engineering slang, 1878 → CVE catalog, 1999 → Codex Security count as vigilance, March 2026
- 1878Edison — "bugs" as defects in apparatus; invader metaphor set.
- 1947Harvard Mark II moth — computing's preferred origin story for "bug."
- 1999MITRE CVE catalog — openings named as common memory.
- 2026March: Codex Security — 11,353 findings presented as vigilance; "noise" and "false positive" used to license discard.