The phrase "a core question of" is correct and usable in written English.
It can be used when discussing a fundamental or essential issue related to a particular topic or subject matter.
Example: "In the debate about climate change, a core question of sustainability is how to balance economic growth with environmental protection."
Alternatives: "a fundamental issue of" or "a central question regarding".
But when Mr. Trump told Hillary Clinton in the first presidential debate that paying no federal income taxes made him "smart," his comment demonstrated a very fundamental divide between the Republican candidate and the electorate on a core question of civic responsibility.
Armed interventions in Libya, Haiti, Iraq, Vietnam, and Korea challenged the US president and Congress with a core question of constitutional interpretation: does the president, or Congress, have constitutional authority to take the country to war? War Powers argues that the Constitution doesn't offer a single legal answer to that question.
In this respect, a core question of democracy how good are our representatives—has infiltrated science.
A core question for the governance of ECEC systems as well as for the legitimization of public investments in these systems refers to the impact of ECEC on child development and educational success.
There is a core question at the heart of this referendum, which is seldom articulated.
The survey included a core question that asks for experience of a number of safety-related, undesirable events.
Manuel Peruar-Vidal, Peru's environment minister who presided over last year's climate talks and is assisting Fabius, said countries had yet to find a formula for reconciling the core question of how industrialised countries and the rising economies should divide responsibilities for dealing with climate change.
The relationship between the empirical data and the findings of a phenomenographic study is the core question of credibility.
"With respect to the Alliance's metrics for categorizing a factory's progress, we have adjusted our measurements to reflect the core question of whether a given factory will be substantially safe when the Alliance sunsets in 2018," he wrote.
No fix other than an outright re-evaluation by the Commission (or by Congress) of the Commission's use of administrative proceedings in contested cases will address the core question of whether a respondent facing serious allegations deserves a truly independent hearing.
An hourglass-shaped review was developed, consisting of three stages: (1) a planning and mapping stage; (2) a focused review concentrating on the core question of whether or not research engagement improves healthcare performance; and (3) a wider (but less systematic) review of papers identified during the two earlier stages, focusing on mechanisms.
