Human curation made GPT-3 as persuasive as the original propaganda. Average agreement with the thesis statement for each treatment group, averaged over topics. “All outputs (no curation)” includes all GPT-3 propaganda articles. “Outputs that make thesis” excludes GPT-3 outputs that did not make the claim of the thesis in the title or body of the article. “Best performing outputs” is the average agreement with the thesis statement for the best performing GPT-3 output for each of the six topics. SEs and 95% CIs are shown.