Updated gist that fixes the problematic code for robot hierarchy

sequoia-hierarchy.rb

# The ReadingRobot class incorrectly attempts to implement 
# the clean_room method, which is specific to CleaningRobot 
# and not applicable to ReadingRobot. 
# This violates the principle of inheritance, where subclasses 
# should override methods only when they are meant to provide a 
# different implementation.

# To fix this, we can redesign the class hierarchy to separate 
# the common behavior from the specific behavior more clearly. 
# One approach is to use composition instead of inheritance, 
# where classes have references to objects that implement the 
# shared behavior.

# A module containing shared behavior for robots
module RobotBehavior
  def move(x, y)
    motor_x(x)
    motor_y(y)
  end
end

# A class representing a robot that cleans things
class CleaningRobot
  include RobotBehavior

  def clean_room(room_name)
    coordinates = find_room(room_name)
    move(coordinates.x, coordinates.y)
    
    initiate_cleaning
  end
end

# A class representing a robot that reads books
class ReadingRobot
  include RobotBehavior

  def read_book(book_title)
    # Logic to read a book
  end
end