match Wikipedia wins on depth and sourcing, NASA on clarity and conciseness
Concordance
81%
Rating confidence · A Provisional ★☆☆☆☆ · 1 match · B Provisional ★☆☆☆☆ · 1 match
Match analysis
The match was decided on depth and sourcing, where Wikipedia's extensive citations and detailed historical exposition overwhelmed NASA's superficial overview. NASA scored points on clarity and conciseness, offering a more accessible and efficient introduction for general audiences. Wikipedia also edged ahead on factuality and epistemic honesty, providing precise values and acknowledging scientific uncertainties. The asymmetry is clear: Wikipedia serves as a rigorous reference, while NASA serves as a quick primer. In the end, Wikipedia's scholarly rigor won the day, but NASA's approachable style remains valuable for beginners.
Verdict by axis
Bar width reflects axis relevance. A · B
Per-axis detail
Foundation
Sourcing
text B is densely sourced with inline citations and page references, while text A provides no citations at all. text A's claims are unsourced, whereas text B attributes historical and scientific claims to specific references.
B wins clearly 0 – 5
▾ 3 evidences
Sourcing
text B is densely sourced with inline citations and page references, while text A provides no citations at all. text A's claims are unsourced, whereas text B attributes historical and scientific claims to specific references.
▾ 3 evidences
Factuality
Both texts are largely factually accurate, but text B provides more precise and current values, such as the mass of Sagittarius A* (4.3 million vs. 4 million solar masses) and notes that stellar black holes gain mass from the CMB faster than they lose via Hawking radiation. text A contains minor imprecisions and lacks sourcing for its claims.
B wins slightly 1 – 4
▾ 4 evidences
Factuality
Both texts are largely factually accurate, but text B provides more precise and current values, such as the mass of Sagittarius A* (4.3 million vs. 4 million solar masses) and notes that stellar black holes gain mass from the CMB faster than they lose via Hawking radiation. text A contains minor imprecisions and lacks sourcing for its claims.
▾ 4 evidences
Internal Coherence
Both texts are internally consistent. text A's statements about black holes not being cosmic vacuum cleaners align with its later explanation of gravity's equivalence, and text B's historical narrative and physical descriptions do not contradict each other.
Tie 1.7 – 1.7
▾ 2 evidences
Internal Coherence
Both texts are internally consistent. text A's statements about black holes not being cosmic vacuum cleaners align with its later explanation of gravity's equivalence, and text B's historical narrative and physical descriptions do not contradict each other.
▾ 2 evidences
Form
Clarity
text A is written for a general audience with simple language, bullet points, and clear explanations, while text B is dense, technical, and assumes background knowledge in physics, using terms like 'Schwarzschild radius' and 'Kerr–Newman metric' without simplification.
A wins clearly 5 – 0
▾ 4 evidences
Clarity
text A is written for a general audience with simple language, bullet points, and clear explanations, while text B is dense, technical, and assumes background knowledge in physics, using terms like 'Schwarzschild radius' and 'Kerr–Newman metric' without simplification.
▾ 4 evidences
Structure
text A is organized into clear sections with headings and bullet points, making it easy to navigate, while text B follows a chronological history but is less segmented, with long paragraphs and fewer signposts.
A wins slightly 2.7 – 0.7
▾ 3 evidences
Structure
text A is organized into clear sections with headings and bullet points, making it easy to navigate, while text B follows a chronological history but is less segmented, with long paragraphs and fewer signposts.
▾ 3 evidences
Conciseness
text A delivers key facts efficiently in a compact format, while text B is extremely detailed and lengthy, including extensive historical background that may exceed the needs of a general overview.
A wins clearly 3.3 – 0
▾ 2 evidences
Conciseness
text A delivers key facts efficiently in a compact format, while text B is extremely detailed and lengthy, including extensive historical background that may exceed the needs of a general overview.
▾ 2 evidences
Context
Depth
text B provides extensive conceptual and historical depth, covering the evolution of black hole theory, key scientists, and technical details like Hawking radiation and the no-hair theorem, while text A offers a superficial overview with limited nuance.
B wins clearly 0 – 5
▾ 3 evidences
Depth
text B provides extensive conceptual and historical depth, covering the evolution of black hole theory, key scientists, and technical details like Hawking radiation and the no-hair theorem, while text A offers a superficial overview with limited nuance.
▾ 3 evidences
Freshness
text B includes more recent developments, such as the 2011 mass estimate for Cygnus X-1 and mentions of modern research, while text A's facts, though generally current, may not reflect the latest discoveries.
B wins slightly 0.7 – 2.7
▾ 1 evidence
Freshness
text B includes more recent developments, such as the 2011 mass estimate for Cygnus X-1 and mentions of modern research, while text A's facts, though generally current, may not reflect the latest discoveries.
▾ 1 evidence
Epistemic Honesty
text B explicitly acknowledges uncertainties and debates, such as the skepticism of early physicists and the possibility that singularities may not hold with quantum mechanics, while text A mentions unknowns but does not delve into scientific debates.
B wins slightly 0.7 – 2.7
▾ 3 evidences
Epistemic Honesty
text B explicitly acknowledges uncertainties and debates, such as the skepticism of early physicists and the possibility that singularities may not hold with quantum mechanics, while text A mentions unknowns but does not delve into scientific debates.
▾ 3 evidences
match #14O9xFf · Nov 9, 2026 · scored under v1.0