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the claim

The blackening of incandescent light bulbs is caused by tungsten sublimation and deposition

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 the blackening of incandescent light bulbs is caused by tungsten sublimation and deposition?

The blackening of incandescent light bulbs due to tungsten evaporation and subsequent condensation on the inner glass surface is a well-established physical phenomenon, requiring no citation.

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

The analysis

The claim describes a standard, textbook thermodynamic process regarding the lifespan and wear of incandescent light bulbs. None of the retrieved papers specifically target or dispute this well-known physical principle, making it common knowledge.

What does the evidence say?

The claim describes a standard, textbook thermodynamic process regarding the lifespan and wear of incandescent light bulbs. None of the retrieved papers specifically target or dispute this well-known physical principle, making it common knowledge.

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