<｜begin▁of▁sentence｜>### Instruction:
Imagine we're looking at a color wheel, with each hue representing a team in a design competition. The directional paths between these hues are like the matchups in our tournament, where one shade outshines another in a head-to-head challenge. We have a palette where "Whimsical White" (node 1) has outshone "Bold Black" (node 0), "Vibrant Violet" (node 3), and "Serene Sapphire" (node 2). "Serene Sapphire" has shown brilliance against "Vibrant Violet" and "Bold Black", and finally, "Vibrant Violet" has managed a victory over "Bold Black".

Our task is akin to tracing the brush strokes in this chromatic competition to see if "Whimsical White" can, through a cascade of victories, outshine "Vibrant Violet" through influence in the underlying matchups. Conversely, does a path exist where "Vibrant Violet" ultimately influences "Serene Sapphire"? In essence, can "Whimsical White's" vibrancy reach "Vibrant Violet", and can "Vibrant Violet" cast its hue onto "Serene Sapphire"?
### Response:
import networkx as nx

# Create a directed graph representing a tournament
G = nx.DiGraph([(1, 0), (1, 3), (1, 2), (2, 3), (2, 0), (3, 0)])

# Check if the graph is a tournament
is_tournament = nx.is_tournament(G)
print('Is graph a tournament?', is_tournament)

# Decide if there is a path from node 1 to node 3
reachable = nx.tournament.is_reachable(G, 1, 3)
print('Is there a path from node 1 to node 3?', reachable)

# Decide if there is a path from node 3 to node 2
reachable = nx.tournament.is_reachable(G, 3, 2)
print('Is there a path from node 3 to node 2?', reachable)
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