... autosegmental phonology. See Goldsmith (1976), McCarthy (1979), Pulleyblank (1 983 ), Clements (1 985 ), Sagey (1 986 , 1 988 ), and Hammond (1 988 , 2005) for discussion. basic properties of trees 43 (a) p (b) * ... This is the so-called non-tangling condition of Wall (1972), which derives a basic assumption of Chomsky (1975): there are no discontinuous constituents.30 A9. Non-tangling condition:(8wxyz 2 N) ... terminals u, v. In Carnie (2006c), I informally present the non-tangling constraint as the no-crossing- branches constraint: (ii) No-crossing-branches constraint If one node X precedes another node...