(1) Critics of the early experiments argued that since chimps did not understand the concept of negating, they were not really using language. (2) (Negating is adding a negative, such as no or not , to a thought.) (3) Sarah, a chimp trained at the University of California, Santa Barbara, showed an understanding not only of negating but also of compound and complex sentences. (4) Sarah learned to compose and read sentences by placing metal symbols on a metallic board. (5) She once asked herself, “What is an apple not?” and correctly—and creatively—replied, “Bread.”
Which sentence includes an objection?