"chief rationale" is a valid and commonly used phrase in written English.
It typically refers to the main or most important reason or justification for something. Example: The chief rationale behind the company's decision to expand into international markets was to increase revenue and diversify their customer base.
But Mr. Kay and his search team had the integrity to report conclusions that undermined the administration's chief rationale for going to war.
The movement was overwhelmingly in one direction: away from rich countries to places where workers with adequate skills were much cheaper.Whether openly stated or not, lower labour costs were almost always the chief rationale.
Most of those surveyed rejected Mayor Michael R. Bloomberg's chief rationale for the practice, saying they did not think that stopping and frisking suspicious people had lowered the crime rate or reduced the use of illegal guns.
Exxon may hold the highest stock valuation among listed firms, but it is dwarfed by Saudi Arabia's unlisted Aramco, whose oil reserves are 20 times larger and off-limits to foreigners.A chief rationale for the recent mergers was that only super-majors can afford to spend the sort of money that might help them bag various giant oil prospects.
Mr. Kerry's efforts to use the disappearance of the explosives to question the president's competence as commander in chief, both on Iraq and on domestic security, signaled that he would take aim directly at Mr. Bush's chief rationale for re-election: that he is better prepared to lead a war against terrorists.
Several of Romney's rivals have made clear they will seek to undercut the chief rationale of his candidacy: that his experience in private business makes him the strongest Republican to take on President Barack Obama on the economy in the fall.
If Mr. Clinton wins an agreement with the North Koreans that he describes as enforceable, he would be undermining one of the chief rationales that the Bush campaign put forward for its national missile defense program, which is to meant to protect against a limited nuclear attack from possible enemies -- specifically North Korea.
"Experience is not the only point," Sanders said, going at one of the chief rationales for Clinton's candidacy.
Reflecting on her victory in the Pennsylvania primary, Senator Hillary Rodham Clinton on Wednesday neatly summed up the chief political rationale of her enduring candidacy.
Col. Choike, the brig chief, had similar rationale.
George O'Grady, the European Tour's chief executive, explained the rationale at the launch of the new trophy.
