gistfile1.rb

class Thing
  def do_something
    puts "Doing something in Thing"
  end
end

class SubThing < Thing
end

module IneffectiveOverride
  def do_something
    puts "Overridden do_something"
  end
end

Thing.send(:include, IneffectiveOverride)


SubThing.new.do_something

SubThing.send(:include, IneffectiveOverride)


SubThing.new.do_something