Justness n. : The quality of being just; conformity to truth, propriety, accuracy, exactness, and the like; justice; reasonableness; fairness; equity; as, justness of proportions; the justness of a description or representation; the justness of a cause.

Example:
what issues do biological theories of criminology bring up regarding free will and the Justness of punishment?

Taxonomy
justness, Synonyms, justice, propriety, conformity, accuracy, exactness, reasonableness, Dictionary, fairness, Quotes, ness, truth, the like, Thesaurus, WordNet, equity, correctness.

Defination from the web:
... In value the satisfaction I had in seeing it represented with all the justness and gracefulness of action. Dryden. ...