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RHY.7:3 - Forces
| Force | Practical tension |
| Compression and discrimination | A summary simplifies comparison while merging some distinct patterns. |
| Structural and experienced properties | A calculation about a pattern does not by itself establish a listener’s interest or a performer’s difficulty. |
| Shared basis and useful variation | Normalizing tempo or phase can help one comparison while removing another task’s constraint. |
| Decision and inquiry effort | Better information may improve a choice, but some missing information cannot change it. |