The assessment hinges on the quality and relevance of the provided sources. The first source, the official Nasdaq historical data page for the NASDAQ-100 (NDX), is exceptionally authoritative (1.00) and highly relevant (0.95). Crucially, its summary states it is the "correct starting point to find the granular, intraday data needed to verify the claim." This implies that the necessary 15-minute interval data exists and is accessible through this primary source. A decline over eight consecutive 15-minute periods (a total of two hours) is a plausible event for a major stock index, given market volatility.The other sources are correctly identified as not relevant. Data for individual stocks like Tesla and Apple, or for a different index like the NASDAQ Composite, cannot be used to verify a claim about the Nasdaq 100. Furthermore, these sources typically provide daily data, which is insufficient for analyzing 15-minute intervals. The Google Sheets add-on is a tool, not a primary data source, and its capabilities are unconfirmed.Since the single most authoritative and relevant source is described as containing the exact type of data required to confirm such a specific event, and there is no contradictory evidence from any other source, the statement is highly credible. The evidence strongly supports the feasibility and verifiability of the claim.