The phrase "a central justification" is correct and usable in written English.
It can be used when discussing the main reason or rationale behind a particular argument, decision, or action.
Example: "The study provided a central justification for the new policy changes, highlighting the need for improved efficiency."
Alternatives: "a primary rationale" or "a key reason".
Harnessing Pride For the Communist Party, nationalism has always been a central justification of its rule.
His capture has been a central justification for Israel's five-year blockade of Gaza.
Chirac's remarks were used by Blair and his ministers as a central justification for an invasion that was not backed by the UN security council.
He also questioned the scientific proof behind a central justification for the law: that the therapy causes serious harm to minors.
That memo was used by the White House as a central justification for Comey's firing, but many law enforcement officials suspected that that was a pretext and that Rosenstein had been manipulated into providing cover for possible obstruction of justice.
Any customs union makes it effectively impossible to negotiate free trade deals with other countries – one of the government's key ambitions and a central justification for leaving the EU.
Independent on Sunday Editorial, August 17 "The inquiry that began as a sideshow is casting a spotlight on Mr Blair's central justification for taking this country to war.
The two say the central justification for establishing a no-flight zone over Libya is that the rebels themselves are seeking military help to end the decades of Colonel Qaddafi's dictatorship.
The most vocal camp, led by Senators John McCain, the 2008 Republican nominee for president, and Joseph I. Lieberman, the Connecticut independent and another hawk on Libyan intervention, say the central justification for establishing a no-fly zone over Libya is that the rebel leaders themselves are seeking military assistance to end decades of dictatorship.
Instead, the very global warming activists she called to serve as expert witnesses delivered a crushing blow to President Obama's central justification for expensive new restrictions on carbon dioxide emissions.
It builds on resolutions against Iraq approved by Congress in 1991 and 1998, but has as its central justification pre-emption, or "anticipatory self-defense," which a senior administration official today defined as the right of the United States to attack a country that it thinks could attack it first.
