The CheckThat! lab aims to advance the development of innovative technologies combating disinformation and manipulation efforts in online communication across a multitude of languages and platforms. While in early editions the focus has been on core tasks of the verification pipeline (check-worthiness, evidence retrieval, and verification), in the past three editions, the lab added additional tasks linked to the verification process. In this year's edition, the verification pipeline is at the center again with the following tasks: Task 1 on source retrieval for scientific web claims (a follow-up of the 2025 edition), Task 2 on fact-checking numerical and temporal claims, which adds a reasoning component to the 2025 edition, and Task 3, which expands the verification pipeline with generation of full-fact-checking articles. These tasks represent challenging classification and retrieval problems as well as generation challenges at the document and span level, including multilingual settings.

翻译：CheckThat! 实验室旨在推动创新技术的发展，以应对多种语言和平台上在线传播中的虚假信息与操纵行为。早期版本主要关注核查流程的核心任务（核查价值性、证据检索与验证），而在过去三届中，实验室增加了与核查过程相关的其他任务。在本年度版本中，核查流程再次成为核心，包含以下任务：任务1 针对科学网络主张的源检索（2025年版本的延续），任务2 关于数值与时间主张的事实核查（在2025年版本基础上增加了推理环节），以及任务3 通过生成完整事实核查文章来扩展核查流程。这些任务代表了具有挑战性的分类与检索问题，以及在文档和片段层面的生成挑战，包括多语言环境下的应用。