The phrase 'unresolved difficulties' is correct and usable in written English.
You can use this phrase to refer to any unresolved issues or problems that may be present in a particular situation. For example, "The project was plagued with unresolved difficulties that the team could not overcome."
It may be connected with quantum-mechanical vacuum energy; however, there are serious unresolved difficulties with this possibility.
So it is clear that even after he was well beyond the earliest stages of his thinking, he continued to assign himself the project of writing works whose principal aim is the presentation of unresolved difficulties.
The paradox of Schrödinger (1935)'s cat is a particularly striking way of stating the unresolved difficulties associated with the first measurement problem in standard (i.e., textbook) quantum mechanics.
For Socratic investigations are motivated by the thought that it is very important to acquire philosophical knowledge, indeed, so important that we should not permit ourselves to stop inquiring even when we have found a really plausible and well-supported opinion that nonetheless faces unresolved difficulties.
However, numerous unresolved difficulties with medication circulation require further regulation.
As in cardiac mapping, some unresolved difficulties remain in the mapping process [ 27].
The unresolved difficulty is that in a complex society, as Habermas asserts, "public opinion does not rule" but rather points administrative power in particular directions; or, as he puts it, it does not "steer" but "countersteers" institutional complexity (Habermas 1996, chapter 8).
The unresolved difficulty is that in a complex society, as Habermas asserts, "public opinion does not rule" but rather points administrative power in particular directions; or, as he puts it, it does not "steer" but "countersteers" institutional complexity (1996b, chapter 8).
For some discussion of the unresolved philosophical difficulties surrounding identification, see Velleman (1992), Bratman (1996); Watson (1996).
Studies with our new model of stress-induced anhedonia suggest that unresolved methodological difficulties in measuring behaviour in chronically stressed animals may be the origin of the above problems.
Unresolved sexual difficulties can create significant problems in love and marriage.
