Here's a breakdown:
* Demonstrably: This part implies that the justification can be demonstrated or shown through evidence.
* Justified: This means that there is a good reason or valid explanation for something.
Example:
* "The scientist's theory was demonstrably justified by the results of their experiment."
* "The judge ruled that the defendant's claim of self-defense was demonstrably justified."
In essence, "demonstrably justified" means that something has a strong foundation and can be defended with facts and logic.