Whodunnit.rb

def location_in_hierarchy(object, method)
  history = []
  current = object.class
  history << current
  while (current.superclass!=nil)
    history << current.superclass
    current = current.superclass
  end
  history = history.reverse
  history.find do |ob| 
    ob.instance_methods.include?(method)
  end
end

Good effort.

Try to write idomatic ruby code. This you will learn with experience.

#Insted of doing this
current.superclass!=nil
#Do this - More readable
current.superclass.present?

You are running a lot of loops. When you write code, try to get the job done with minimal effort. Each loop is a load on your CPU. If you application needs to scale, you need to optimize every frickin line.

Good effort though :)