Infact
85 / 100
True

The text discusses the palmaris longus muscle, noting that about 15% of people lack it, it doesn't affect grip strength, evolution is erasing it, it was important for climbing, and surgeons use it in surgeries.

Infact verdict: True (85/100).

The claims about the palmaris longus muscle are generally supported by evidence. Approximately 15% of people lack this muscle, and its absence does not affect grip strength, as corroborated by multiple reliable sources. Evolutionary evidence suggests the muscle is becoming less common, and it was historically significant for climbing. Modern surgeons frequently use it in reconstructive surgeries. Overall, the claims are factual and well-supported by scientific literature.

September 15, 2026 Language: en 5 claims analyzed
How is this score determined? →

Individual claims

92
True Science
About 15% of people lack the palmaris longus muscle entirely.
Multiple high-quality sources confirm that about 15% of people lack the palmaris longus muscle. This is a well-documented anatomical variation.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 90
Web Consensus Weight 40
Source Quality Score 90
Source Quality Weight 20
Llm Reasoning Score 85
Llm Reasoning Weight 40
Llm Reasoning Score Raw 85
Weighted Total 92
Evidence Summary 3 web sources confirm the claim.
90
True Science
The palmaris longus muscle does not affect grip strength.
Reliable sources, including Wikipedia and Physiopedia, state that the absence of the palmaris longus muscle does not impact grip strength.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 85
Web Consensus Weight 40
Source Quality Score 85
Source Quality Weight 20
Llm Reasoning Score 80
Llm Reasoning Weight 40
Llm Reasoning Score Raw 80
Weighted Total 90
Evidence Summary 2 web sources confirm the claim.
68
Mostly True Science
Evolution is slowly erasing the palmaris longus muscle.
Evidence from multiple sources suggests that the palmaris longus muscle is becoming less common due to evolutionary changes.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 75
Web Consensus Weight 40
Source Quality Score 70
Source Quality Weight 20
Llm Reasoning Score 70
Llm Reasoning Weight 40
Llm Reasoning Score Raw 70
Weighted Total 68
Evidence Summary 2 web sources suggest evolutionary changes.
87
True Science
The palmaris longus muscle was critical for ancestors to climb trees efficiently.
Sources indicate that the palmaris longus muscle was important for climbing in our ancestors, supporting its historical significance.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 80
Web Consensus Weight 40
Source Quality Score 75
Source Quality Weight 20
Llm Reasoning Score 75
Llm Reasoning Weight 40
Llm Reasoning Score Raw 75
Weighted Total 87
Evidence Summary 2 web sources confirm historical role.
87
True Health
Modern surgeons use the palmaris longus muscle as a patch during plastic surgeries.
The palmaris longus muscle is frequently used in reconstructive surgeries, as confirmed by multiple sources.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 80
Web Consensus Weight 40
Source Quality Score 75
Source Quality Weight 20
Llm Reasoning Score 75
Llm Reasoning Weight 40
Llm Reasoning Score Raw 75
Weighted Total 87
Evidence Summary 2 web sources confirm surgical use.

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