Such a nice diagram from an academic paper on safe semi-supervised machine learning[0].
It's easy to see, fully understandable, information dense, and complete. I wish all figures were like this.
[0] Y.-F. Li and D.-M. Liang, “Safe semi-supervised learning: a brief introduction,” Front. Comput. Sci., vol. 13, no. 4, pp. 669–676, Aug. 2019, doi: 10.1007/s11704-019-8452-2.