Study Type allows Claims and arguments (opposing and supporting) what makes it an extremely interesting tool, with web2 if you disagree with a study you can't do anything, just write another study. With Web 3 and Geo, you can, now, add or refute an idea directly and thus advance a debate. Article is a practical Type to bring data from a CC source. News Type is helpful if you want to point out an interesting but copyrighted news.