It was never stated. It's an assumption. For all I know paper in general is special. However, Paper is the only thing, apart from chakra-beings, in NV that can hold a seal. Therefore, I just assume the paper which holds seals are some special type of paper.
Naruto wiki is fanmade. For all you know I wrote that months ago and I'm now re-assessing it... It doesn't dispute what I'm saying considering the example there has a chakra being. Unless you can show me a stone with an FTG marking, or a tree, or anything like that, I'd say my point still stands.
Dude wtf? Maybe they teleported them to another clone? Maybe they didn't disappear? Who knows? Where else would tobirama even go? You're trying to claim he marked some stone somewhere in some non-existent time frame he had?
My argument applies both ways....... without his chakra being shared, naruto was unmarked. He couldn't teleport him away or teleport to him. Your argument that tobirama teleported them to an unmarked rock infront of sasuke makes no sense. You're even trying to bring up kunai like that changes something. Minato teleported the entire SA around 1 kunai. By your logic, they should have all been clustered in one mass orgy ontop of that 1 kunai, yet 10k+ shinobi were spread out nice and evenly. We even saw the kunai in front of Kiba, but now you need to see kunai at minato's feet when it has been proven time and time again that his FTG his a radius? For that matter do you even know if tobirama did
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? What you're trying to imply is that tobirama teleported without a marking, which makes less sense than a marking on a rock.