There is nothing to engage with. I think tersely. Some researchers could learn.

I find it annoying that a large part of research is the obsession of taking a perfectly smooth, gradual phenomenon and introducing artificial boundaries, sometimes even with formal labels. And then we spend the next few decades rolling it back as we inevitably find out that reality is nuanced, and the arbitrary categorization is more of a distraction than a meaningful tool. But I'm sure this fantastical finding was great for somebody's career.