The phrase "a viable defense" is correct and usable in written English.
It can be used in legal contexts or discussions about arguments, strategies, or justifications that are practical and capable of succeeding.
Example: "The lawyer presented a viable defense that could potentially exonerate her client."
Alternatives: "a valid argument" or "a sound defense".
In 1978 we discovered, above all, that Twinkies were a viable defense for murder.
It is about the "Stand Your Ground" law, that may still provide a viable defense for Zimmerman.
"If they can prove that the board, lawyers and accountants knew everything, it could be a viable defense," said Ira Lee Sorkin, a former prosecutor who currently practices at Carter Ledyard & Milburn in New York.
But Justice Neil J. Firetog told Mr. Aron on Thursday that "a defense of not responsible by reason of mental disease or defect would not be a viable defense".
Since the co-op may bring a nonpayment proceeding against him, the writer should be sure he is entitled to the amount in question so that he has a viable defense.
US Airways finds itself too strong to be considered a failing carrier, which would have helped it win regulatory approval for its deal with United, but too weak to mount a viable defense against an armada of competitors closing in on its lucrative East Coast base.
But some current and former Defense Department officials say the exploiting of the system that preceded Mr. Cantrell's kickback scheme has had a damaging impact, slowing progress toward building a viable missile defense system by diverting money to unnecessary or wasteful endeavors.
It chills free speech through the award of disproportionate damages, a lack of viable defenses and the application of the law to cases with only the slightest links to Britain, even when neither party lives there, a practice that has led to what is known as "libel tourism".
A viable self-defense claim would prevent a conviction at either a state or federal trial.
In contrast, explicitly religious ideologies tend to be fairly parochial, limiting their appeal and making them viable defenses only for those who already believe in a supernatural god [15].
In short, if a suspicion of entrapment seems a viable starting-point for a defense, forget it.
