Additional material related to our rebuttal of Sweatman, Powell, and West's comment on Holliday, et al. (2023) Comprehensive refutation of the Younger Dryas Impact Hypothesis (YDIH), Earth-Science Reviews vol. 247 https://doi.org/10.1016/j.earscirev.

The material presented here augments our rebuttal of comments by Sweatman, Powell, and West (hereafter SPW) on our comprehensive refutation of the Younger Dryas Impact Hypothesis (YDIH) published in Earth-Science Reviews. Owing to journal space limitations, we were unable to respond to their comments in a line-by-line fashion, instead we elected to focus on two themes that emerge from papers supporting the YDIH: 1) the conduct of science, and 2) recurrent misapprehensions by proponents. The additional material consists of two tables. Table 1 presents a listing of critical comments by SPW and our replies, while Table 2 provides links to post-publication review comments on 33 papers supporting the YDIH that document problems and issues in those papers.