Wordology, Justiciable, Moot, and Unripe

Justiciability is one of several criteria that the United States Supreme Court use to make a judgment. In order for an issue to be justiciable (liable to be tried in court) by a United States federal court, all of the following conditions must be met.
The parties must not be seeking an advisory opinion.

There must be an actual controversy between the parties, meaning that the parties cannot agree to a lawsuit where all parties seek the same particular judgment from the court (known as a friendly suit); the parties must each be seeking a different outcome.

The question must be neither unripe nor moot.
   An unripe question is one for which there is not yet at least a threatened injury to the plaintiff, or where all available judicial alternatives have not been exhausted.
   A moot question is one for which the potential for an injury to occur has ceased to exist, or where the injury has been removed.

Wordology, Moot

This definition from the Oxford Dictionary may surprise you. Definition of moot: adjective
 1 subject to debate, dispute, or uncertainty: whether the temperature rise was mainly due to the greenhouse effect was a moot point
 2 North American having little or no practical relevance: the whole matter is becoming increasingly moot
- verb  raise (a question or topic) for discussion; suggest (an idea or possibility): the scheme was first mooted last October. This whole thing is becoming moot.