"respond to guidance commands with sufficient precision" is just restating the same problem.
"if you put the same package on a normal rocket motor it (demonstrably) worked just fine." Except that the interceptor wouldn't be able to reach the target traveling at hypersonic speeds.
In other words, the guidance didn't work. Either the interceptor missed because it was off target or it missed because it was too slow. Dressing it up in technicalities doesn't negate the failure for the purposes of SDI.
"if you put the same package on a normal rocket motor it (demonstrably) worked just fine." Except that the interceptor wouldn't be able to reach the target traveling at hypersonic speeds.
In other words, the guidance didn't work. Either the interceptor missed because it was off target or it missed because it was too slow. Dressing it up in technicalities doesn't negate the failure for the purposes of SDI.