Wait.
Both Reagan AND Thatcher "developed" Alzheimers/dementia?
I'M SHOCKED!
The brain needs exercise (e.g. reading, critical thought, statistical analysis, ad infinitum) and once it becomes "set in stone", all is lost, dementia is certain, and one becomes a conservative.
It's sad really, because no one is born a conservative, but one is born with a brain fated towards dementia (e.g. Iraq/WMD/A-Queada/eminent threat, deficit spending, Sean Hannity, Willie Horton, etc.)
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"My people (the real Americans- descended from the original Angle-Saxon pioneers)"-Coke S.