Comparative phylogenetics can be applied to these emails only in a weakened form. The Enron archive does not provide a tree of the company. What it supports is a reconstruction of six named practices, with explicit uncertainty about who started them.

None of the six has a single supported origin. People use the names as if the structures already exist, and later messages rarely quote one parent email. Verbatim copying is clearer in ordinary "out of the office" mail than in Raptor. Social clustering on the email graph is real and is also real for that control, so it does not mark deception.

The sharpest corpus evidence is local:

- On 11 May 2000 David Delainey called Raptor a possible "accounting hedge" that could diverge from "real value" if JEDI were taken back at existing marks, and he asked how to keep workouts from being shed into it. That is the earliest original Raptor prose found after copy- and quote-stripping. It is not an invention date.
- Talon and Harrier are a later Raptor variant. On 15 August 2000 Sara Shackleton circulated their swap confirms, including to Enron Broadband people. On 30 August 2000 Scott Sefton wrote that the Harrier–Talon swap should not require disclosures to CalPERS.
- Whitewing, as of 24 February 2000, is described by Scott Sefton as already created with Vinson & Elkins, under a Condor holding company.
- Prepays split. A June 1999 Gerald Nemec gas prepayment is ordinary commercial paper. Chase, Mahonia, Yosemite, and Citibank prepaid structures show up as separate 2000 introductions.
- Side letters from 1999 are mostly ordinary contracts. A November 2001 note discusses a side letter with GE and Bechtel to avoid consolidating Dabhol. That use is not descended from the 1999 letters in the transmission graph.
- "Related party" begins as a 2000 risk-report category. On 2 August 2001 a note attributed to Andrew Fastow says LJM2 is no longer a related party for proxy and financial-statement disclosure. October 2001 mail is SEC-inquiry coordination and broadcast, not a dyadic tree.

These are corpus-grounded readings of sentences. They are not findings that a named person committed fraud. Full methods, null tests, message ids, and caveats are in `REPORT.md`.