I have always found that to be orthodox buddhist double speak to come up with some basis for reincarnation that does not admit the existence of souls. I know souls exist because I have experienced that they exist. If it pleases you to do so, you may read, for example, my https://medium.com/know-thyself-heal-thyself/eternal-soul-properly-defined-fe7a93e534f8 or my https://medium.com/about-me-stories/my-journey-spiritual-and-otherwise-9d5f6aca18ee