The "all-knowing-Vortiguant" can be found in another location. Enable the map "d1_eli_01" code. After the map loads, find your way inside the airlock. After the scanning sequence finishes, you should see the right doors opening. Directly in front of you will be a fence, and beyond it a blue pick-up. Ignore Dr. Mossman, who is talking to you, and enable the "noclip" code. Go through the truck and you will see a man in a blue shirt with no eyes. Ignore him and go down the ramp down. On the left side of the large space will be a Vortigaunt. Disable the "noclip" code and talk to him as many times as you can to see that he is crazy.