Archimedean Point
Punctum Archimedes
Hypothetical vantage point from which an observer can objectively perceive the subject at hand, with a view of the entire system.
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Origin
The expression comes from Archimedes, who supposedly claimed that he could lift the Earth off its foundation if he were given a place to stand, one solid point, and a long enough lever. "Give me a place to stand and rest my lever on, and I can move the Earth."