The assessment is "likely_true" because multiple high-authority sources corroborate the core claims of the statement, despite some inconsistencies in the specific percentage reported.The claim that copper reached a "new record high" is strongly supported. One Bloomberg article explicitly states, "Copper Hits Record in London," and a Wall Street Journal article confirms that copper prices were "climbing and reached a record high." This establishes the most significant part of the statement as factual.The claim of a "4.5% increase" is less certain, with various sources providing different figures. The Bloomberg article that confirms the record high mentions an intraday gain of "as much as 6.6%," which is a large single-day increase in the same ballpark. However, another Bloomberg article cites a daily gain of 2.7%, and an AAStocks report mentions a rise of over 2%.There is one significant piece of contradictory evidence from the Wall Street Journal, which claims copper *fell* by 4.8%. However, the credibility of this specific article is diminished for two reasons: 1) It is directly contradicted by another Wall Street Journal article stating that copper prices were climbing to a record. 2) The same article notes that gold retreated by 4.5%, suggesting a potential confusion of commodities or figures in either the source or the original statement.In conclusion, the weight of the evidence strongly indicates that copper prices did experience a significant single-day surge to a new record high. While the exact figure of 4.5% is not consistently verified and may be inaccurate, the overall substance and magnitude of the event described in the statement are well-supported, making the statement likely true.