What exactly am I talking about?

Well, in video game Portal 2 developed by Valve, part way through the game you get introduced to white gel, which is stated by Cave Johnson in a recording to be crushed up moon rocks. In this recording, he also says that moon rocks are GOOD portal conductors, and for some reason that lead people to think they were the ONLY portal conductors, even though there is SO MUCH EVIDENCE proving otherwise.

First off, considering you don't come across this gel until you're already getting very close to the top layers of old Aperture Science, it's very safe to assume that the white gel wasn't invented until a lot later into Aperture's life. However, there are still PLENTY of tests that involve the portal gun before you encounter the white gel, meaning that white gel ISN'T the ONLY portalable surface.

Even if you find that to be a wild guess, you can't deny that if Aperture used crushed up moon rocks for portable surfaces right from the beginning, Cave Johnson would have gotten sick from them a lot earlier. However you can clearly hear in his first few recordings that he's all fine and dandy.

Now, if you're STILL somehow not convinced, think about this: you're able to shoot portals on many walls just randomly throughout the facility that aren't apart of testing tracks. Considering the fact it's stated that buying a shit ton of moon rocks is highly expensive, I don't think Aperture Science would be crazy enough to paint almost EVERY WALL in their facilty with white gel.

Well, now that I've hopefully guided you toward the truth, you may be wondering, "Why are you bothering to write all this?" Well that's because I'm TIRED of comment sections on RANDOM PORTAL VIDEOS saying stupid shit like "Erm, actually this part is innaccurate because portals can only be placed on crushed up moon rocks. " And literally EVERY time NO ONE corrects them. The replies are FULL of people being like "Wow you're right you're so informative," or whatever, and it's time that it STOPS.

Thank you for your time. :3