For benefit of your limited mind, let me recap the main arguments:
1. The mere fact that an aircraft was able to reach within 10 kms of Naliya is no indication of the failure of the Indian air defence network.
2. If, in fact, we were able to evade radars all the way up to within 10 kms of Naliya, we have seriously revealed our capabilities to the enemy, who will now review his air defence in light of our capabilities.
3. The fact that ScanEagle was used now gives the enemy an insight into our preferred tool. He can make deductions on the capabilities, or lack thereof, in our other assets.
4. And finally, your limited brain has limited knowledge as well. The radar signature changes, as the azimuthal angle changes when a distant object gets closer. It even changes based on the aircraft's orientation relative to the radar.
5. And before you try to be smarter than you really are, yes the ScanEagle is a widely known craft and the enemy can get information on it from anywhere, but our job is to make the enemy's job as hard as we can, and not give him free information.
I will count this mission a failure. There is only one set of circumstances where we can call it success: it was our first test run of some advanced capability which we prefer to exercise before actual war, and we have credible intel that the enemy air defence network did indeed fail to detect the aircraft. And this is information that a moron like yourself should never be in possession of.