Diachronic and Synchronic
Diachronic and Synchronic are two logics of order, meaning, and expression which oppose and/or complement one another.Diachronic(or Syntagmatic)the sequential logic of a road
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Synchronic(or Paradigmatic)the all-at-once logic of a pool
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| Process | Structure |
| "What Comes After What" | "What Goes With What" |
| Cause and Effect Order | Associative Order (non-sequential) |
| Meaning from Plot, Sequence | Meaning from Proximity, Contrast and Similarity |
| Anticipation and Satisfaction | Connections and Patterns |
| Like a road you're traveling down | Like a pool of people and objects you climb into |
Often Combined In Practice

Just as the juggling unicyclist combines linear and circular motions, many narratives combine the diachronic logic of plot with synchronic patterns of symbols, themes, and motifs.
Ferdinand de Saussure first makes the distinction between the synchronic and diachronic in his Course in General Linguistics (1916). Though de Saussure is talking about approaches to studying language use, his distinction can be generalized to the study of lots of phenomena.
See Also
Rhizome
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