70
Mostly True
Global
Fatal familial insomnia is a rare and severe disease where a protein mutation in the brain prevents sleep, leading to death and body deterioration.
Fatal familial insomnia (FFI) is a rare genetic disorder caused by a mutation in the PRNP gene, leading to progressive insomnia and severe neurological decline. This fatal condition results in severe sleep disruption, followed by cognitive and physical decline. A mutation in the PRNP gene leads to misfolded prion proteins, causing brain degeneration. There is consensus in the evidence about these claims, and FFI is indeed rare, affecting a very small number of individuals worldwide.
Individual Claims
76
Mostly True
Health
Fatal familial insomnia causes people to die from lack of sleep.
The evidence strongly supports that fatal familial insomnia (FFI) leads to death following severe insomnia. According to multiple medium-reliability sources, FFI is characterized by progressively worsening insomnia, leading to death. Sources such as NCBI and Osmosis confirm this progression.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
85
Web Consensus Weight
50
Source Quality Score
85
Source Quality Weight
25
Llm Reasoning Score
70
Llm Reasoning Weight
25
Weighted Total
76
Evidence Summary
3 web sources confirm FFI causes death from insomnia.
72
Mostly True
Health
A protein mutation in the brain prevents sleep in fatal familial insomnia.
The evidence indicates that fatal familial insomnia involves a mutation in the PRNP gene, affecting prion protein folding in the brain, particularly in the thalamus, disrupting sleep regulation. Various medium-reliability sources confirm the mutation's impact on sleep.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
80
Web Consensus Weight
50
Source Quality Score
75
Source Quality Weight
25
Llm Reasoning Score
70
Llm Reasoning Weight
25
Weighted Total
72
Evidence Summary
3 web sources confirm prion mutation disrupts sleep.
76
Mostly True
Health
Fatal familial insomnia causes the body to gradually deteriorate.
The evidence supports that FFI leads to body deterioration due to progressive insomnia and brain degeneration. Medium-reliability sources describe significant mental and physical decline as FFI advances.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
85
Web Consensus Weight
50
Source Quality Score
80
Source Quality Weight
25
Llm Reasoning Score
75
Llm Reasoning Weight
25
Weighted Total
76
Evidence Summary
3 web sources confirm physical and mental decline in FFI.
57
Mixed
Health
Fatal familial insomnia is extremely rare.
The rarity of fatal familial insomnia is well-documented, affecting fewer than 100 people globally. This is confirmed by sources like the NORD, and all evidence aligns with FFI being exceptionally rare.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
55
Web Consensus Weight
50
Source Quality Score
60
Source Quality Weight
25
Llm Reasoning Score
65
Llm Reasoning Weight
25
Weighted Total
57
Evidence Summary
2 web sources confirm FFI's extreme rarity.
