Illustrating the need for using "self" when using a setter method within an instance

person.rb

class Person
  attr_accessor :name
  
  def rename(new_name)
    # creates a new local variable called `name` and sets its value to the variable `new_name`
    name = new_name 
    
    # calls the `name=` method of the instance
    self.name = new_name # 
  end
end