greatest_inheritance.rb

module GreatestModule
  def puts arg
    super arg + " is greatest word"
  end
end

module Kernel
  prepend GreatestModule
end

Kernel.puts "hi" # => hi
Object.__send__ :puts, "hi" # => hi
puts "hi" # => hi

p Kernel.ancestors # => [GreatestModule, Kernel]
p Object.ancestors # => [Object, Kernel, BasicObject]

include Kernel

Kernel.puts "hi" # => hi
Object.__send__ :puts, "hi" # => hi is greatest word
puts "hi" # => hi is greatest word

p Kernel.ancestors # => [GreatestModule, Kernel]
p Object.ancestors # => [Object, GreatestModule, Kernel, BasicObject]