PHILADELPHIA — It seemed like a throwaway comment at the time, but it’s the perfect encapsulation of how Mike Brown has the Knicks on the front foot.  When asked how the 76ers might adjust to the Knicks playing without OG Anunoby in Game 3 , Nick Nurse said, “I guess I gotta see what happens, which way they go.”  Throughout these playoffs, it’s been Brown who is dictating things, and opposing coaches who are reacting and trying to keep up.  Brown used the regular season to experiment — a major departure from his predecessor, Tom Thibodeau — and it is paying major dividends in the postseason. Mike Brown talking with Josh Hart during the Knicks’ Game 2 against the 76ers. Charles Wenzelberg / New York Post The Knicks have been nimble in making needed adjustments, whether with the rotation or with scheme.  The biggest adjustment has been with the offense. Midway through the first round, the Knicks began running their offense through Karl-Anthony Towns at the elbow.…