The assessment is primarily based on a single, definitive primary source: an S-1 registration statement filed directly with the U.S. Securities and Exchange Commission (SEC). This document is explicitly for the 'MORGAN STANLEY ETHEREUM ETF' and serves as direct, high-authority evidence that confirms the statement is true.Several other sources present circumstantial or contradictory evidence, but it is significantly weaker. Sources confirming that Morgan Stanley also filed for Bitcoin and Solana ETFs do not invalidate the existence of an Ethereum ETF filing; a financial institution can apply for multiple products. Similarly, news reports and social media posts from reputable outlets like Reuters and CoinDesk that only mention the Bitcoin and Solana filings represent an 'argument from silence.' Their omission of an Ethereum filing does not prove one wasn't made, especially when contrasted with the direct SEC filing evidence.Finally, a document mentioning Morgan Stanley's involvement as an authorized participant in a Grayscale Ethereum product is tangential and does not contradict the claim that Morgan Stanley filed its own, separate ETF application. Therefore, the direct evidence from the SEC filing is overwhelmingly persuasive, making the statement highly likely to be true.