Is there canonical reference to show that the original Cyberdyne Systems research in T2 (which was presumably destroyed by teenage John and Sarah Connor, Miles Dyson and T-800) somehow helped or influenced Robert Brewster's building of military Skynet system in T3?
In T3, upon being asked how he exists, T-850 told:
In Terminator Salvation, it was displayed that Dr. Serena Kogan from Cyberdyne Systems convinced Marcus Wright to donate his body for research in 2003. In 2018, Marcus saw a news while connected with Skynet that Cyberdyne Systems was sold to US Airforce. And, Dr. Serena's visual from Skynet side says that Dr. Serena was also behind development of Skynet.