Baraka, I don't think it tells you anything necessarily about McCain (though it's suggestive), but it does remind you that just because someone got Alzheimer's at 68 doesn't mean everyone gets it at 68. These are individual things, and some people are fitter than others. I'm not a biologist or a doctor, and I'd certainly agree that older people have more medical issues than younger people, but it does not follow from that every person over 70 is at death's door. David ben-Gurion, for example, was active in politics until he was 82. Nelson Mandela was 77 when he was elected president of South Africa (and from what I understand he is still in good shape). The examples go on and on.
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