What's the adjective for justness? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs justify and just which may be used as adjectives within certain contexts.
“The judge's justified criticisms of the BBC's sloppy journalism and cavalier attitude to handling complaints did not come as a surprise.”
“He made a reasonably justified decision to extricate himself from this relationship.”
“Running the formula will hence allow the researcher to determine if his subjective believe in a particular occurrence or proposition is justified based on his experience.”