It means that something is true, there can be no arguments (disputes) about it.
Indisputable.
indisputable; definite
It is undisputably indisputable.
The indisputable fact is, life happens goes on.
He made an indisputable statement about global warming, or so he thought...
The usual term is "indisputable" which means unable to be denied or refuted, i.e. certain, absolute.
Literature
Unfortunately for the defendant, that one drop of blood provided indisputable DNA evidence that the victim had been in the trunk of his car.Far from being indisputable, a person's eyewitness account is usually the least reliable evidence there is.
Mistake
indisputable
An opinion that is absolutely correct.
It is something that is proven as true and indisputable.