3 ms·Data are plural, eg: "Data arent't that big." I believe datum is singular.by musgrove 9y agoData are plural, eg: "Data arent't that big." I believe datum is singular.ocb 9y agoNot true in the vast majority of usages. Maybe in scientific writing, but this is a blog post.Sean1708 9y agoData as a mass noun, while less traditional, is still valid.