Vidur Kapur — Notable For: Superforecaster affiliated with Good Judgment, Swift Centre, Samotsvety, and RAND; AI policy researcher at ControlAI; key member of Sentinel early warning system for global catastrophes

NoteThe source confirms most elements of the claim: Vidur Kapur is identified as a Superforecaster affiliated with Good Judgment, Swift Centre, Samotsvety, and RAND, and is associated with Sentinel. However, the source does NOT mention his role as 'AI policy researcher at ControlAI' — this is unverifiable from the provided text. Additionally, the source describes him as 'forecasting at' these organizations rather than explicitly stating he is a 'key member' of Sentinel's early warning system, though his association with Sentinel is confirmed. The temporal marker 'as of 2026-03' cannot be verified from this source, though the recent posts (May 2026, April 2026) suggest the information is current as of mid-2026. The claim is substantially but not completely confirmed by the source.