The phrase "conceptual difficulty" is correct and usable in written English.
It can be used when discussing challenges or obstacles related to understanding or grasping a concept.
Example: "The students faced significant conceptual difficulty when trying to understand advanced calculus."
Alternatives: "theoretical challenge" or "intellectual hurdle".
Many jurisdictions have special legislation on this topic, but the conceptual difficulty is by no means resolved.
A conceptual difficulty in Newtonian mechanics, however, is the way in which the gravitational force between two massive objects acts over a distance across empty space.
"There may be some conceptual difficulty in defining 'major life activities' to include work," Justice Sandra Day O'Connor wrote in a 1999 opinion that left the issue unresolved.
Technocratic utopias like those envisioned by Wells and Skinner have a serious conceptual difficulty: where, how, and why is the process of "improvement" to stop?
The interference pattern that results when a radiation front hits two slits in an opaque screen is often cited to explain the conceptual difficulty of the wave particle duality.
Though not easy to read, it brilliantly expresses the ambiguities and blind alleys as Galileo wrestled with the conceptual difficulty of introducing a non-geometrical quantity — time itself — into the proportions.
Common conceptual difficulties underlie many of these questions.
However, when the stochastic equations are nonlinear, computational as well as conceptual difficulties are encountered.
What intellectuals are prone to forget is that this distance poses not only conceptual difficulties but ethical ones as well.
The conceptual difficulties of the approach and usefulness for model selection are discussed.
Conceptual difficulties in delimiting the borders of subspecies are pointed out.
