To be fair, it was just a hypothetical diagnosis.
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A New York doctor, after reviewing a scan of his brain, told him that his health issues could be “caused by a worm that got into my brain and ate a portion of it and then died,” Kennedy said in the 2012 deposition, which concerned a divorce from his second wife, Mary Richardson Kennedy.
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Also note the context in which this came up ... during a deposition for a divorce. You'll say anything in that context if your lawyer advises you it'll minimize the damage.
CNN doesn't really bother with pointing out that this is not a confirmed medical fact, but just a possible explanation he was told. No, they just go on with their interview with another doctor, who never examined RFK Jr., to have him describe it as if it is a confirmed fact.
He's still probably cuckoo for cocoa puffs, and the real story there is that whatever caused it he did go through a period of cognitive impairment. That is not disputed, and that is not a small thing for someone running for POTUS. The "worm" angle is more salacious and nasty though, so they run with that. Fuckin' journalists are scum.