The phrase "a core rationale" is correct and usable in written English.
It can be used when discussing the fundamental reasoning or justification behind a decision, action, or belief.
Example: "The project's success can be attributed to a core rationale that emphasizes sustainability and community engagement."
Alternatives: "a fundamental reason" or "a primary justification."
All conventions on human rights have this tenet as a core rationale.
Externalities provide a core rationale for governmental policy action, including such topics as conflicts over spectrum used by space assets, stimulating innovation, orbital debris challenges, dual-use space technologies, and unclear or conflicting rights to develop space-based resources.
Our results are consistent with the agency cost mitigation of free cash flow and underinvestment providing a core rationale for firms' adoption of such a complex asset-based financing.
Achieving scientific literacy for all is a core rationale for science coursework as part of general education (Gen Ed) requirements for undergraduates (Meinwald and Hildebrand, 2010).
At present, the core rationale is a "detect-alert" sequence informing either the patient or a central clinic.
1) Start with an authentic effort based on a core business rationale.
However good the cause, it doesn't make up for the core rationale that the quickest, easiest way for a woman to get attention is to disrobe.
While this may have recently become technically feasible (e.g. www.tesla.com/solar), our core rationale is to examine the potential ability of solar panels.
Here's a political postulate for you: whether or not a bad moment sticks to the candidate depends on how closely related it is to the core rationale of that candidate or his opponent.
The descriptions of President Obama as a "tyrant," the intimations that he is "alien" and the suggestions that his presidency is illegitimate are essential to the core rationale for resisting any restrictions on firearms.
He frequently attacks the core rationale of Bush's foreign policy, and receives enthusiastic applause for doing so, which indicates that Republican views about the war in Iraq might be more heterodox than the leading candidates and their strategists assume.
