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How does one cause impede the action of another cause?

How..? By pure rhetoric: a double negation removes itself. Don Quixote sees a peasant but he knows she is a princess made to look plain by an evil magician. Classical descriptions in terms of causes …
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Is the idea that "Everything is energy" even coherent?

Memorably, Feynman in his Lectures on Physics states: It is important to realize that in physics today, we have no knowledge of what energy is. Energy, the Subtle Concept. The discovery of Feynman’s …
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