In this case, there are simple effects that lead to causes; causality is present. There is a thing called universal law, even if it is not proven, the laws are present. Otherwise, how can we prove that a character is 3D by default?
So regarding this. Yes, we can say and agree that by default, things such as space, time, Logic, physics, causality, or whatever you have are set up in the verse. And that every verse would have these things in one way or another, otherwise it would not function properly.
The problem thereafter stems from you claiming that because Janemba was affecting this “the laws of the afterlife,” he was thus also affecting that “the causality of the world as well,” and your reason to substantiate this is based on real-world theories and principles. This is where your argument falls flat because for you to prove Janemba can affect causality, you’d need to substantiate that causality is governed/affected/manipulated by the laws of the afterlife, IN THE CONTEXT OF DB, not by theoretics of real life.
Yes, there are effects and there are causes
Yes, causality is or at least should be present in the verse by default
But to say causality was manipulated or affected when the laws were overturned, just based on causality being present by universal law principles and nothing else, is at least a stretch and at most a fallacious interpretation
Besides, how do you prove gravity, or radiation, or even space, the atmosphere, air etc. in a fiction? Your appeal to reality does not work on universal laws.
Again, even if we agree to this idea of universal constants and universal laws, we can’t just say that
“Janemba changed the laws of the afterlife,” so causality was also affected. Not because of anything indicated or substantiated in DB, but because of real-life principles on how universal laws and constants work.
I stop you right there, manipulating probability means making the improbable probable, so it has nothing to do with what you mentioned. Janemba made the improbable probable since bringing the dead back to life without the rules opposing it has a zero chance; you should know that.
Let me pose a question to you.
What is the probability of every human on the planet being able to bleed blue instead of red from now on? Zero, right? Literally impossible. So, if someone, like say, Shenron or Whis, makes it so that humans of Earth can bleed blue, would you consider that probability manipulation? Because they made it so that something that would otherwise be impossible to occur in nature now happens regularly?
You see how this looks, right?
They could have simply altered humanity's biology so that their blood turns blue. Or they could warp reality, and suddenly the color blue is altered to appear red. Or they could have altered the laws of nature to make humans bleed blue like
crabs. Or they could have altered causality, making the cause of "bleeding" result in the effect of "blue coming out", or whatever have you. In all these scenarios, something that’s impossible to occur in nature happened. But just because they did that doesn’t mean the automatic default is probability manipulation, nor does it mean manipulation of probability was the specific means to achieve it.
Context matters, and you need context of Janemba specifically manipulating vectors subjected to probability, luck, chance, possibilities, variables, etc., for probability hax to be viable. Otherwise, it’s just reality warping or law manipulation,
which he already has.