That figure came from a 10K SEC filing by Twitter dated Feb 2022 (https://s22.q4cdn.com/826641620/files/doc_financials/2021/q4/947c0c34-ca90-4099-b328-a6062adf1

That figure came from a 10K SEC filing by Twitter dated Feb 2022 (https://s22.q4cdn.com/826641620/files/doc_financials/2021/q4/947c0c34-ca90-4099-b328-a6062adf110f.pdf https://s22.q4cdn.com/826641620/files/doc_financials/2021/q4...). It is a public document, so of course Musk relied on it. No further due diligence is needed on that point because SEC filings MUST be accurate. Now if the board lied, in writing, in a 10K filing, it is a Very Big Deal(tm).