Canada.rb

class A
  def isVisable
    true
  end

  def method_missing(m, *args, &block)
    if m =~ /eh$/i
      merica = "is" + m.to_s.capitalize.split(/eh$/i).first
      if self.respond_to?(merica)
        return self.send(merica)
      end
    end

    super
  end
end

a = A.new
puts a.isVisable
puts a.visableEh