And if you do not have a GF junctioned, you cannot draw, cast, or do anything other than attack. None of your party. Not the SeeDs, not Irvine, not Rinoa, not Seifer not Edea, not Laguna, Kiros, or Ward, can draw magic without the aid of a GF.
Those last three are former Galbadian soldiers. They lack the ability to draw-cast unaided. Since we see that later galbadians can cast magic, know that they do not have Gardian Forces, and that some of the highest trained mercenaries on the planet do not know how to draw magic without external aid, it does not follow that regular military worldwide know a method that has somehow eluded these highly trained mercs.
Addendum: Saw this in the 'logical' thread and wished to address it.
Kadaj, Yazoo, and Loz, are not clones. They are Shinentai. Will made form. Sephiroth's, specifically.I mean, I remember talking about FFVII's formerly mysterious aftermath and I mentioned that there were still clones wondering about and people shot me down for that... So I just shut up. I opted to just discuss it, not prove anything... Guess who was right the whole time? Sorry, I had to gloat on that one....