What are some limitations of Locke’s argument?

Locke’s tabula rasa argument contends that all ideas and hence all knowledge comes from experience. According to this argument, human nurturing provides one with ideas and hence knowledge of things. How can you support Locke’s argument with the idea that humans have innate abilities, such as instincts and intuition? Are these innate abilities forms of knowing? If so, is Locke’s argument valid? What are some limitations of Locke’s argument?