state machines confuse me

person.rb

class Person < ActiveRecord::Base

  state_machine :state, :initial => :authed do
    event :filled_out_profile do
      transition :authed => :unaccepted
    end
    event :admin_accepted do
      transition :unaccepted => :accepted
    end
    
    state :authed, :unaccepted, :accepted do
      validates :name, presence: true
      validates :linkedin_token, presence: true
      validates :linkedin_image_url, presence: true
    end
    state :unaccepted, :accepted do
      validates :email, presence: true
    end
    state :accepted do
      validates :is_accepted, presence: true, inclusion: { in: [true] }
      validates :type, presence: true, inclusion: { in: TYPES }
    end
    
    state :authed do
      def update_profile_attributes(attributes)
        if update_attributes(attributes) && filled_out_profile!
          In::PersonMailer.new(self).deliver
          true
        end
      rescue
        false
      end
    end
    state :unaccepted do
      def update_profile_attributes(attributes)
        if update_attributes(attributes) && admin_accepted!
          In::PersonMailer.accepted(self).deliver if email.present?
          true
        end
      rescue
        false
      end
    end
    state :accepted do
      def update_profile_attributes(attributes)
        update_attributes(attributes)
      end
    end
  end

end