Linguistics 522
Assignment 3 (partial discussion)
Important Terms 

Observation 1 about dominance and precedence: For any two nodes in the same tree, either one precedes the other or one dominates the other.
Observation 2 about dominance and precedence: Dominance and precedence are mutually exclusive. Observation about immediate dominance: a node can have only one mother.
Exhaustively dominates: Holds between a node M and the set D of all nodes that M immediately dominates. Thus, there must be nothing that M immediately dominates that is not in D. Answer 1.17 on. p. 70: V, NP_{2} and PP. 

CCommand 
Definition: Node A Ccommands Node B if every branching node dominating A also dominates B, and neither A nor B dominate the other. Note that CCommand and domination are mutually exclusive, just as CCommand and precedence are. Question: For any two nodes in the same tree, is it the case that one must either dominate or Ccommand the other other? If not, give an example of two nodes in the same tree such that neither Ccommands the other and neither dominates the other. Question: Can two nodes Ccommand each other? Examples? 

Trees: Selected Examples 
bright blue train Compare: a bright blue star in Cygnus (2g) Louis hinted Mary stole the purse deftly.


Structural relations 
Answer to (2a):


Negative Polarity 
Three possible answers (at least).
Further data: lift a finger:


Platypi 
