全部主张 / 航海、天文与测量
郑和宝船使用钢制龙骨
判定边界
双方证据链未闭合（本轮），不是双方等真，也不是给视频主张背书。
视频原话摘要
钢制龙骨
- 领域
- shipbuilding
- 涉及对象
- 郑和宝船；钢制龙骨
- 声称年代
- 明代；永乐年间
- 话语角色
- 作者主张
证据连接
来源记录
SRCREF:R005-HMAIN-F5:SRC-F5-AAS-SIZESRCREF:R005-HMAIN-F5:SRC-F5-CHURCH-PLAUSIBILITYSRCREF:R005-HMAIN-F5:SRC-F5-NANJING-YARDSRCREF:R005-HMAIN-F5:SRC-F5-UNESCO-JUNKSRCREF:R005-HVIDEO-F5:S-F5-01SRCREF:R005-HVIDEO-F5:S-F5-02SRCREF:R005-HVIDEO-F5:S-F5-03SRCREF:R005-HVIDEO-F5:S-F5-10SRCREF:R005-HVIDEO-F5:S-F5-12
待解问题
报告锚点：S05.5 · 研究 lane：F5_MARITIME_ASTRO
双轨条件矩阵
H_VIDEO 与 H_MAIN 独立列出必要条件、正向预测、反证条件、替代机制、形成链和协调伪造规模。
| 模型 | 条件类型 | 条件 | 评估 | 关联证据 |
|---|---|---|---|---|
| H_VIDEO | necessary_condition | 须有永乐时期或同代可定位的钢制结构龙骨文本、遗物或材料记录；钢须指结构件而非工具或铁件 | input_limited | |
| H_VIDEO | positive_prediction | 船体材料记录、金属件样本或工程分析明确支持钢制龙骨 | input_limited | |
| H_VIDEO | disconfirmer | 木制船体记录；仅有铁钉、铁件或一般冶金史；无船体结构证据 | input_limited | |
| H_VIDEO | alternative_mechanism | 铁件加固木船；铁/钢概念后置翻译；现代伪引文 | input_limited | |
| H_VIDEO | formation_chain | ASR材料词→对象/年代→结构位置→材料鉴定 | input_limited | |
| H_VIDEO | fabrication_or_coordination_scope | none;不可用未相关的冶金能力替代船体对象证据 | input_limited | |
| H_MAINSTREAM | necessary_condition | a named keel or hull component must be identified; steel/iron composition must be analytically distinguished; the object must be dated and tied to the fleet; iron fasteners must not be conflated with a steel keel | input_limited | |
| H_MAINSTREAM | positive_prediction | an excavated keel sample or contemporary technical record should show steel composition, manufacture and fleet provenance | input_limited | |
| H_MAINSTREAM | disconfirmer | wooden keel/plank evidence, iron anchor/nails only, or a later replica component would disconfirm the steel-keel reading | input_limited | |
| H_MAINSTREAM | alternative_mechanism | wood keel with iron fittings; partial iron reinforcement; later shipyard or replica misattribution | input_limited | |
| H_MAINSTREAM | formation_chain | FC-F5-C19 | input_limited | |
| H_MAINSTREAM | fabrication_or_coordination_scope | not_required_by_claim_logic | not_applicable_by_claim_logic |
推理桥梁
H_VIDEOotherinput_limited
古代有钢铁冶金→郑和船使用钢制龙骨
H_MAINSTREAMotherinput_limited
metal object→material identification→keel role→treasure-ship provenance
审计字段与说明
- 终态方法
- dual_track_evidence
- 音频核验
- asr_ambiguity_retained
- 研究备注
- 冻结命题与矩阵终态逐 ID 对齐；非事实 lane 不转写为历史胜负。