GopherCite, Sparrow, WebGPT and most likely the new bing (WebGPT2) all first find sources then generate output, so you're just mistaken. The first two specifica

GopherCite, Sparrow, WebGPT and most likely the new bing (WebGPT2) all first find sources then generate output, so you're just mistaken. The first two specifically get folks check whether the selected source snippet supports the answer. Source: worked on GopherCite.