george boole ate my brain

prithee_shall_i_do_some_stuff?.rb

def prithee_shall_i_do_some_stuff?
  (hash[:foo] == "1" || !hash.has_key?(:foo)) && \
  (!hash["bar"].include?("Horses") && \
    hash["baz"].blank? && \
    hash["quux"].blank? && \
    hash["buzz"].blank?)
end

TrueOf.rb

class Hash
  def true_of?(subject_key, &block)
    TrueOf.new(self).instance_eval(&block)
  end
end

class TrueOf
  attr_reader :value, :key 

  def initialize(hash, key, &block)
    @hash = hash
    @key = key
    @value = hash[key]
  end
end