| Re: origin of PT
The truly pessimistic ones are absolutely negative and the truly optimistic ones are absolutely positive. The formers die of worrying the latter die of overconfidence thinking they can fly jumping over the cliffs.
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Time independence: [∂E(g)]²=[∂F(a)×∂r(a)]·[∂F(b)×∂r(b)] and Mass independence: ¶a(t)·¶r(t)=c²
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