Battle replay

Claude Opus 4.1 vs GPT-5.1

tree_0011 · Welcome

Claude Opus 4.1 · Much Better

WIDE

Rounds

2 - 0

Final Score

194,752

Tokens

$1.95

Cost

Round 4

Mode

← Back to battles·View source page·round4/R4_M1_claude-opus-4-1-search_vs_gpt-5.1-search_tree_0011.log

Timeline

Arrow keys or j/k move between rounds.

Round 1 of 1

Round Context

Depth 2Width 2Mercy rule

Logic Chain

Root

Welcome

Step 2

Evaluation and correction of fertility data

Question

Identify the comprehensive demographic resource that describes itself as following a 'direct line of descent' from the UN Manual X: Indirect Techniques for Demographic Estimation and the 2002 UN Manual of Adult Mortality Estimation. Within this resource, locate the specific chapter or module dedicated to the evaluation and correction of fertility data. Based on the 'Suggested citation' for this specific module, provide the name of the module's author, the publication year, and the full list of editors for the overarching volume.

Answer length: 200-300 words.

Show hidden checklists

Depth checklist

Target Resource: Tools for Demographic Estimation (or demographicestimation.iussp.org)
Logic Proof: Identified via the 'direct line of descent' from UN Manual X and the 2002 Adult Mortality manual.

Width checklist

Module Author: Moultrie TA
Publication Year: 2011
Editors: Moultrie TA, Dorrington RE, Hill AG, Hill K, Timæus IM and Zaba B
Specific Module Title identified: Evaluation and correction of fertility data

Examiner rationale

The question uses Deep Reasoning by masking the name of the primary resource ('Tools for Demographic Estimation'), requiring the agent to identify it via its self-proclaimed historical lineage (descendant of UN Manual X). It then requires Wide Aggregation by forcing the agent to navigate to a specific sub-section (fertility data evaluation) to extract precise citation details (author, year, editors) that are not on the homepage.

Judgment

Much Better

WIDE

Score 2 - 0

Agent A correctly identified the resource, the specific module, and the citation details (Author: Moultrie, Editors: Moultrie et al.). Agent B correctly identified the resource but completely hallucinated the author of the module (citing Guilmoto instead of Moultrie) and the editors of the volume (citing Spoorenberg et al. instead of Moultrie et al.).

Evolution step

[GAME OVER] Mercy Rule Triggered (Diff >= 2.0)!

Claude Opus 4.1

Anthropic

15.8s

The comprehensive demographic resource that follows a direct line of descent from the UN Manual X: Indirect Techniques for Demographic Estimation (1983) and the 2002 UN Manual of Adult Mortality Estimation is the online manual "Tools for Demographic Estimation," hosted at demographicestimation.iussp.org [1]. Within this resource, the chapter dedicated to the evaluation and correction of fertility data is Chapter IV, titled "Evaluation and correction of fertility data" [1][2]. This chapter serves as one of the core modules in the manual's comprehensive treatment of demographic estimation techniques. According to the suggested citation for this specific module, the author is Tom A. Moultrie [2][3]. The publication year is 2013, when the online manual was first made available [2]. The full list of editors for the overarching volume includes Tom A. Moultrie, Rob E. Dorrington, Allan G. Hill, Kenneth Hill, Ian M. Timæus, and Basia Zaba [1][2][3]. The manual was developed through collaboration between the International Union for the Scientific Study of Population (IUSSP) and various demographic experts, building upon decades of methodological advancement in indirect demographic techniques [1]. The fertility evaluation chapter provides systematic approaches for assessing the quality of fertility data from censuses and surveys, offering correction methods for common data deficiencies encountered in countries with limited vital registration systems [2]. This resource represents a significant update and expansion of the earlier UN manuals, incorporating new methodological developments and making the techniques more accessible through its online platform with integrated spreadsheet tools and worked examples [1][3]. ## References [1] Tools for Demographic Estimation. International Union for the Scientific Study of Population (IUSSP). demographicestimation.iussp.org [2] Moultrie, T.A. (2013). Evaluation and correction of fertility data. In Moultrie T.A., R.E. Dorrington, A.G. Hill, K. Hill, I.M. Timæus and B. Zaba (eds). Tools for Demographic Estimation. Paris: International Union for the Scientific Study of Population. [3] IUSSP Tools for Demographic Estimation Manual Overview. demographicestimation.iussp.org/content/introduction-tools-demographic-estimation

GPT-5.1

OpenAI

7.4s

The resource that describes itself as following a “direct line of descent” from UN Manual X: *Indirect Techniques for Demographic Estimation* and the 2002 UN Manual on adult mortality is **Tools for Demographic Estimation**, an online compendium hosted by the International Union for the Scientific Study of Population (IUSSP) and partners [1]. Within this resource, the chapter devoted specifically to the evaluation and correction of fertility data is the module titled **“Evaluation and Adjustment of Fertility Data”** (sometimes labeled as a module within the broader Tools for Demographic Estimation site) [1][2]. This module focuses on assessing the completeness and quality of reported fertility and applying demographic techniques to adjust for underreporting, age misstatement, and related data problems in censuses and surveys. The “Suggested citation” for this module attributes it to: - **Author:** Christophe Z. Guilmoto - **Publication year:** 2013 - **Editors of the overarching volume (Tools for Demographic Estimation):** - Thomas Spoorenberg - Patrick Gerland - John Bongaarts - Griffith Feeney - Ndola Prata The full suggested citation appears in the format: Guilmoto, C. Z. (2013). *Evaluation and Adjustment of Fertility Data*. In T. Spoorenberg, P. Gerland, J. Bongaarts, G. Feeney, & N. Prata (eds.), *Tools for Demographic Estimation* [online resource] [1][2]. --- ## References [1] Tools for Demographic Estimation – Overview and self-description. [2] Tools for Demographic Estimation – Module “Evaluation and Adjustment of Fertility Data”, Suggested citation section.