postels_law_6.rb

def philosophize(thinker, thoughts)
  thinker = Philosopher(thinker)
  Array(thoughts).map do |thought|
    thinker.think(thought)
  end
end

def Philosopher(param)
  return param                    if param.kind_of? Philosopher
  return Philosopher.find(param)  if param.kind_of? Integer
  return param.to_philosopher     if param.respond_to? :to_philosopher
  raise ArgumentError
end