The assessment is based on overwhelming and consistent evidence from multiple high-authority sources. The most credible sources provided are primary financial data aggregators: Yahoo Finance (Source 1), CoinMarketCap (Source 2), and Coinbase (Source 3). Their summaries indicate they provide direct access to historical price data for Ethereum, which would unequivocally confirm that its price has dropped below $4,000 on numerous occasions. This is further corroborated by a historical summary from GlobalData (Source 4) and several news articles (Sources 5, 6, and 8) that explicitly report on this specific market event. There is no conflicting evidence presented; no source claims that the price has never been below $4,000. While some sources were irrelevant due to their technical nature (Sources 9 and 10) or unreliable (Source 7), they do not contradict the claim. The cumulative weight of the evidence from the top-tier, relevant sources makes the statement highly probable.