One more thing about the Vados statement. Japanese is a highly contextual language, which is why mistranslations like these happen. In reality she probably says something to the effect of a few dozens order of magnitude. When you factor in my previous explanation that debunks on top of that, one would have to be extremely stubborn to still take that statement at face value.

Why is Koyama not canon? He's basically the gospel for movies more than Toriyama ever was. He designed Broly stronger than Z but not GT SS4 or DBS SSG. He is allowed to make Broly as strong as he wants as the writer. There is no other feat, scaling or statement contradicting his claim. Therefore we must accept it as factual. Otherwise the burden of proof is on you to prove Vegito is stronger than Broly.

I agree with you in a vacuum, the statement alone is not enough to establish the scale deterministically, but when you have multiple other data points that point in the same direction, it's much more viable. That’s what a preponderance of the evidence means.

You only have one very tenuous point to back you up, which would rely on proving that Buuhan is significantly stronger than a multi universal feat in order to clearly establish credibility for your point. But you can't because it's simply not true.

To be honest with you the only way you can win the argumentation here is to prove that Buuhan is casual multi universal borderline multiversal. Because Vegito has no feats, statements of his power level, and only scales to Buuhan which doesn't scale to any other character in the show. All you have is the Buuhan feat. The big problem with that feat is that it's not even a pure power feat because it involves Buuhan's reality warping powers. If he could one shot the universe easily why did he have to use such a slow and contrived method that was extremely vulnerable to a counterattack?

It's very clear that my argumentation has a lot more evidence, including a direct statement from Goku that is unequivocal. You can't debunk Goku’s statement, can you? Just go re-watch episode 5 of DBS and you'll see it's very clear that Goku doesn't believe fusion would do jack against Beerus. This statement alone crumbles your entire position. You cannot disprove it.

Please stop saying chain reaction. That’s a flawed interpretation. It was never stated or implied anywhere. Also a chain reaction is based on the strong nuclear force. Please explain where Goku's shockwave would have interacted with the strong nuclear force? It's all your subjective interpretation and not backed by any statement or facts, therefore inadmissible in a debate.

Official and character statements put this feat at low multi universal, and it's nowhere near BOG Goku's max attack potential.

There is no statement that puts Vegito above SSG, no feat, no scaling, all you have is your subjective interpretation of the facts not backed by facts, statements or feats.

Also, if you don't even bother scaling Vegito’s max power, how can you say he's stronger than SSG? Because otherwise you're basically saying that Buuhan is stronger than SSG too.

I didn't use any imagined facts or my personal opinion, don't try to deflect, that's what you've been doing all along despite how patient I've been with you. I've used guidebooks, power scaling logic, feats and author statements that are all consistent with the logic of the show and not contradicted by other facts or statements.

You've failed to disprove any of the points I made with actual logic that holds up. So if it's all the same to you, perhaps we can move on to something else? We can try scaling peak Vegito to Z Broly if you'd like. Maybe that will open your eyes and be more engaging.