This is an interesting and thought provoking paper.

The authors raise a number of important issues that landscape evolution modelling (myself included) should consider before blindly using a model

All queries and suggestions have been satisfactorily addressed

I recommend that the paper be published after the consideration of the editor

This is an interesting paper. This is demonstrated by the fact that all Reviewers have made substantial and thoughtful comments that examine terminology, math and also importantly the numerical methodology. These comments have required considerable effort to be addressed.

In particular, Reviewer 3 has spent considerable time and thought examining the paper. He raises a number of key issues. It is clear that some of the comments are quite difficult to resolve and the authors have done a very good job at addressing them.

I recommend that the paper be published as is.

I appreciate the thorough effort the authors have gone through to address the reviews while also maintaining the original spirit of their study.

I think the disagreements between reviewers and authors, especially reviewer 3, are part of a healthy debate and difference of interpretation rather than being of a technical nature. I agree with the AE that publishing as is should occur, and I expect that this work will attract interest and further discussion with the broader readership.