I think the article title is not representing the actual finding well. Stated better in this article: https://earthsky.org/space/2i-borisov-pristine-comet-inter

I think the article title is not representing the actual finding well. Stated better in this article: https://earthsky.org/space/2i-borisov-pristine-comet-interstellar-visitor https://earthsky.org/space/2i-borisov-pristine-comet-interst..., "2I/Borisov could represent the first truly pristine comet ever observed," meaning it hasn't interacted with a star before.