The oft-touted claim that the chiefs did not cede sovereignty needs to be challenged whenever it arises.
Factual evidence that can be used against this claim is available in the Judge Anthony Willy article, ‘Sovereignty and the Treaty of Waitangi’, and the book ‘The Treaty and its Times’ by Paul Moon and John Briggs - both of which provide an account of the events leading up to the signing of the Treaty of Waitangi.