Sentence examples for core problem is that from inspiring English sources

The core problem is that Iran has successfully hidden the extent of its nuclear program, and its progress.

The core problem is that cooking is defined as work, and fast food is both a pleasure and a crutch.

The core problem is that minds wander.

The core problem is that Pakistan is no longer really a country, if it ever was.

Inevitably, the core problem is that you're trying to see too many things.

The core problem is that living conditions haven't really caught up with the improvements in people's income.

The core problem being that galleries aren't typically short of artworks to hang on their walls.

The core problem was that deep links only really worked if a user already had the app.

The core problem was that human brains had not had an upgrade since the Pleistocene epoch, yet jets required human decisions at more than triple the tempo of propeller-driven aircraft.

The core problem was that the stranglehold that market logic secured over public life in this period made the most direct and obvious climate responses seem politically heretical.

"The core problem was that he was not willing to do the things he'd have to do to run for President.