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Discover LudwigThe phrase "are the core problem" is not correct in standard English.
It should be rephrased to maintain grammatical accuracy, typically by using "is the core problem" if referring to a singular subject.
Example: "The lack of communication is the core problem in our project."
Alternatives: "is the main issue" or "constitutes the primary problem."
Exact(2)
Flank limitations are the core problem.
But to suggest these shortcomings are the core problem is complacent, and overlooks the real improvements that have taken place in recent years.
Similar(58)
Opacity and leverage are the core problems with our banking system and Limited Purpose Banking, which I discuss in my book, Jimmy Stewart Is Dead, fixes both.
What are the core problems your product and service solves?
I knew that was the core problem.
Crosstalk is the core problem in creating three-dimensional illusions.
It is the core problem lurking within the cacophonous Brexit debate.
"That was the core problem that had built up behind an unmanageable set of issues.
"Protectionism in industrial countries is the core problem in the fight against poverty," he argues.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com