What do the Epsilonists say about a JetPack?
How do they say something different about the "Boot", as you said?
Seriously, what else could the stick man figure be, honestly? whether the JP is in the game or not, that stick man is flying a JP.
EVERYTHING on the mural that we have solved is a definite, not a maybe. Meaning we didn't have to interpret anything, it is as it is on the mural.
EXAMPLE: We don't have to interpret the Rain Cloud, it looks like one and is one.
EXAMPLE: We know the EYE's represent UFO's. this is not an interpretation, as the UFO's show up in 2 places with EYE's, exactly where the clues show them being.
Interpreting that the JP stick man is a Scuba Diver or a Hiker is pretty dumb IMHO. No interpretation necessary for this mystery, this is why we aren't getting anywhere. People are looking for the hidden meanings.
It's like trying to translate English to a native English speaker, you don't need to do so, it's already readable.
I'm not saying it's not an image of a jetpack. I'm saying that going "it looks like a jetpack, therefore we need to look for a jetpack" isn't how we're going to solve this.
The Fort Zancudo Jetpack connection is the only thing I've seen that makes any sense without making big leaps of logic, but that originally came about due to overlaying the mural and flipping it horizontally. Assuming that it means "There is a Jetpack at Fort Zancudo" is foolish, is what I say. Saying that Fort Zancudo is the EQUIVALENT of Area 69 from San Andreas, however, is what allows the whole 'Zancudo = Jetpack on the Mural' idea to still have any real sway for me.
I'm not claiming I know what it really signifies, and nobody here -knows- what the 'jetpack' symbol actually means beyond the fact that it's a symbol that looks like a man wearing a jetpack. Saying you know more about what that symbol means without anything to back it up is ridiculous.
The only reason why we have any knowledge of what the 'Eye' symbol means is because we FOUND something that it could be applied to. Did we find a Jetpack wherever the Jetpack symbol is? No? Then don't say the symbol specifically means there's a jetpack there. We didn't find a giant cracked egg, and I guess, yes, we did find a UFO over Fort Zancudo where the UFO symbol is on the mural (sort of), but that doesn't exactly mean we should be applying these direct leaps of "A = A" to everything.
Also, if you're using the Mural Overlay as evidence that the UFO's are showing up exactly where they're marked off, how does the Hippie Camp UFO work out exactly? The most I've seen regarding that is one of the X's from the mural lining up over it, along with the Zancudo UFO, but then the rest don't line up with anything in particular. Then the overlay of the mural on the mountain, and the '3D map' theory for that only lead us to the approximate locations of glyphs, but they don't lead us anywhere in particular, except possibly the Hippie Camp. But that's only because of some of it's shared glyphs, among other things.
We know what the symbols look like, but again, if the everything on the mural is definite, then how is it that the cracked egg isn't an actual thing in-game? It's been thrown around to mean either a rock like an egg, or a road matching the crack, or it represents, I repeat, represents an easter egg, and not an actual, literal EGG.
The Jetpack symbol doesn't have to actually mean Jetpack. The Jetpack was a useable item, a vehicle, something you used to get around, in San Andreas. It could very well represent a special vehicle, or a special item, instead of an actual jetpack. It could represent the general place where the jetpack was found in San Andreas. The three symbols at the bottom could mean "UFO Easter Egg where you got the Jetpack", meaning "Go to Fort Zancudo to find a UFO". And that explanation would work pretty well to find the Zancudo UFO.
Again though, the Jetpack symbol doesn't actually mean there has to, definitely, gotta be, a Jetpack in-game. Just like there doesn't actually have to be a pilotable UFO in-game, or an egg-shaped vehicle or anything of the sort.
As for the Epsilonists, they said that damn boot (and several other items) were not of this earth. To Michael, they were just ordinary bits of junk lying around. But just because something looks like junk, doesn't mean it's junk. Just because the jetpack symbol looks like a jetpack, doesn't mean you'll find a jetpack.