>>139889671. You can't verify their claims from a second independent source.
2. They cannot explain the subject matter in clear language and obfuscate unnecessarily to hide or gloss over pertinent information, for example: deaths becomes 'collateral damage'.
3. When there are real world consequences to their expert findings e.g. passing of legislation and the legislation is passed at breakneck speed
4. When their reports or findings are difficult or impossible to obtain except through official channels and their raw data is not released.