> Why don't they just say "This seems to be a 'brushing scam'. Because it's more definitive to say we have *no* evidence than possibly to imply, by omission, that we *might* have some, but if we do, we're ignoring it. Compare: 1. "We have no evidence that alien spacecraft are real." 2. "Alien spacecraft seem not to be real." The statements are not precisely equivalent - particularly if you're an official spokesperson (or a trial witness), whose statements may be scrutinized for weasel words.
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