1) "A portion of them have also been given ABT created by Zero Sr." Hmm, I don't know if Zero Sr. is the sole creator of ABT, but it's worth a mention. It might be similar to how someone can "create" a brownie in an Easy Bake Oven, but they didn't really "invent the brownie".
2) I will add the source. I do agree, "It is revealed that..." implies VLR reveals it, when it is reality, it is actually supplementary material. You're welcome.
1) I agree that Zero Sr. likely did not invent or soley create ABT and that there could've been a precursor material, but I think he improved it so greatly that it's a much better product and currently what we see in VLR. Thomas Edison didn't invent the lightbulb either but he made it commercially viable and improved upon it enough that people (admittedly errornously) credit him for it. I believe that would be Zero Sr. to ABT in this case. Likewise I've edited Light Field and Sean's pages to imply an ABT precursor since Zero Sr. was obviously not working on the AB Project prior to those character's appearances in their respective games.
Thank you for establishing the already established. Even though he said he knew exactly who Zero Sr. was, they never in the game touch upon where he got that information. Alex has explained that the information comes from a Q&A so it's correct but the wording of the sentence was wrong.