The phrase "no concrete solution" is correct and usable in written English.
It can be used when discussing a problem or issue that lacks a definitive or practical answer.
Example: "After extensive discussions, we concluded that there is no concrete solution to the ongoing conflict."
Alternatives: "no definitive answer" or "no tangible resolution."
However, the president offered no concrete solution or mechanism to achieve cost savings.
While Avinor states that there is need for an expansion of Terminal B, no concrete solution has been found, in part because of the lack of space in the area, although this can partially be fixed by removing the general aviation from the area.
He offered no concrete solution, but suggested parole boards should be given "greater latitude" in deciding, he said, "When is it time to go home?" Finding public support for such changes is a major problem, Brown told members of the 9th Circuit federal courts at the outset of a three-day conference on prison litigation.
So far, no concrete solution has been proposed to put an end to this violation.
The CEM warned the government three years ago that there was a problem with falling numbers of staff, but no concrete solutions emerged.
The memo pleads for employees to prepare for "a number of targeted moves" in coming weeks, but offers no concrete solutions to Cisco's problems.
Liu wrote to Britain's chancellor, George Osbourne, before the meeting on 7-8 June stressing how disease control is a public good, but the G7 provided no concrete solutions for fighting epidemics, and showed little will to reform the WHO, despite criticising it heavily.
While no concrete solutions to this problem have yet been found, it is evident that simply outlining the various components of natural selection rarely imparts an understanding of the process to students.
Romney seemed self-assured and friendly, even as he gave no concrete solutions.
"Yesterday all the ministers agreed that this is an issue and that criminal justice in cyberspace is being challenged by this, but for now no one really came up with any concrete solution," she said.
But none of these were recommended at the Council meeting, and diplomats involved in the consultations agreed that the discussions dwelt more on the enormous internal and regional complexity of the problem than on any concrete solution.
