minimisation was previously successful but has yet to be combined with modern feature learning techniques, because 4

We thank the reviewers for their extensive comments. Where is the novelty (R2+R4) / What is the point of the new proofs (R2)? However, our primary result is to show why it works. Newton's method with a more stable trust-region based method gave rise to a more stable fixed-point (line 131), and Given this, partial derivatives and full derivatives coincide. 'Wiberg optimisation is alternation (see [4]), and an inappropriate description for our work' (R6).