|World lines: describe the path or orbit that an object travels in space time. Since there is no absolute rest, all macroscopic bodies in the universe describe orbits. These are composed of several components, such as, for example, the orbit of the Earth around the Sun, the orbit of the solar system around the center of the galaxy, and the movement of the entire galaxy. This results in a superposition of several screw motions. See also space time, change, motion, four dimensionalism._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. |
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World lines/Trajectories/Gärdenfors: Objects do not make jumps in spacetime, i.e. their spacetime paths are connected.
This is the background of the psychological phenomenon of object permanence (Piaget, 1972). An object is still suspected in the place, even if it is temporarily hidden.
Consequence: this also shows that it is not sufficient to identify objects with the set of their object-categorical properties. > Identification/Individuation/Gärdenfors.
_____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution.
The Geometry of Meaning Cambridge 2014