Review for NeurIPS paper: Approximate Cross-Validation for Structured Models

Correctness: Mostly correct with some misleading wording used as explained below. "But this existing ACV work is restricted to simpler models by the assumptions that (i) data are independent and (ii) an exact initial model fit is available. In structured data analyses, (i) is always untrue, and (ii) is often untrue." If we assume complete independence, there is no common model. It would be better to discuss conditional independence.