The phrase "unresolved puzzle" is grammatically correct and can be used in written English
It is typically used to describe a problem or situation that has not yet been solved or fully understood. Here is an example of how it could be used in a sentence: "The disappearance of Amelia Earhart remains an unresolved puzzle, as her fate and the location of her plane have never been definitively determined."
Running simulations at the scale of kilometers therefore requires overcoming upscaling of reaction processes, which has been a long-standing and unresolved puzzle [73, 74].
This process of follicular selection still remains an unresolved puzzle.
The oversight of the underpinnings of poor help-seeking behaviour might represent missing pieces in the unresolved puzzle of men's health.
Elegant lineage tracing experiments have more recently provided valuable insight into the developmental fate of mammary stem and progenitor cells [ 2, 3]; however, the factors that govern these outcomes remain an unresolved puzzle.
Mr Flynn has done Sartrean initiates a large service, but this is not an introduction.Though he writes within Sartre's thought, using his vocabulary, Mr Flynn stresses unresolved puzzles.
But before we fire up the grills and break out the iced six-packs to celebrate, it should be noted that the job figures still contain some unresolved puzzles.
Blessed with a scientific controversy or two and a handful of unresolved puzzles, the physics of baseball has enough scientific depth to attract academic researchers, as evidenced by a session on the topic at a meeting of the Acoustical Society of America this month in Chicago.
Perhaps the most counterintuitive notion that comes from the NOS is the well-supported view that unresolved puzzles and seemingly refuting evidence do not always result in rejection of a scientific idea (Clough, p. 76).
The Parmenides is perhaps the clearest example of such a work, because here Plato relentlessly rubs his readers' faces in a baffling series of unresolved puzzles and apparent contradictions.
Students can reflect as well upon issues on the growth of science: Perhaps the most counterintuitive notion that comes from the NOS is the well-supported view that unresolved puzzles and seemingly refuting evidence do not always result in rejection of a scientific idea (Clough, p. 76).
Their functions and origins remain unresolved puzzles.
