Data Science Context Presentation

graph TD
  A[New User Signs Up] --> B{Any Data?}
  B -- No --> C[Global Baseline / Popular Movies]
  B -- Minimal --> D[Content-Based Filtering / Genres]
  D --> E[User Rates 5+ Movies]
  E --> F[Collaborative Filtering / UBCF]
  F --> G[Hyper-Personalized Feed]

# --- The Cold Start Failure ---
# Trying to get 'known' data from an undefined evaluation scheme
# This triggers the 'object not found' error because the user is new!

# results <- getData(e, "known") 

# ERROR: object 'e' not found
# Analysis: The system cannot evaluate a user who isn't part of the 
# training/testing sets yet.