Hmmmmmmm, NIST crypto document
https://csrc.nist.gov/CSRC/media/Publications/nistir/8202/draft/documents/nistir8202-draft.pdf
https://csrc.nist.gov/CSRC/media/Publications/nistir/8202/draft/documents/nistir8202-draft.pdf

so, bitcoin cash is the original blockchain. interesting.
Bitcoin cash is the original block chain?? I am fairly certain the information in that image is just wrong. Segwit activation did not cause a hardfork, it motivated it.