Since Edison's day, the fundamental problems of battery-powered cars have never been solved.
One of the fundamental problems of safety is embedded in this example.
But the fundamental problems of official corruption and conflicting interests remain unsolved.
These voluntary provisions, however, will not address the fundamental problems of the health system.
Introducing a hypothecated health tax, although politically appealing, will fail to address the fundamental problems of the NHS.
These are not necessarily timeless questions, at least not in the way that fundamental problems of philosophy are.
"The mood in the market is better, but the fundamental problems of the euro zone remain unresolved".
"I frankly don't think there is more that the Fed can do to deal with the fundamental problems of the economy right now," he said.
But the preoccupation with the supposed decline has diverted attention from other, in many ways more fundamental, problems of social mobility.
The fundamental problems of the pre-crash economy – rising income inequality, over-reliance on debt, weak effective demand – have not been solved: merely papered over.
"Tackling the fundamental problems of our food system will be difficult but is essential for a healthier and more secure future for all UK families".
