ActiveRecord models deny their ancestry. What gives?

lolrails.rb

class Bonk < ActiveRecord::Base
end

Bonk.ancestors.include? ActiveRecord::Base
# => true 

Bonk.is_a? ActiveRecord::Base
# => false 

# um...WAT

#  X.is_a? Y should return true if Y is a superclass of X or
# if Y is a module included by X. So, um... what gives?
# lolrails?

Shame was my first guess.

Answer thanks to @jm on Twitter: Bonk.is_a? won't work, but Bonk.new.is_a? DOES. You have to use it on instances, not their classes.