Phonological Derivation
Rule-ordered derivation from underlying form to surface phonetic form.
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flowchart TD
UR[Underlying representation\n/kæt+z/] --> R1[Rule 1: voicing assimilation\n→ /kæts/]
R1 --> R2[Rule 2: aspiration of initial /k/\n→ /kʰæts/]
R2 --> SR["Surface representation<br/>[kʰæts]"]