I'm sure it was a mere detail to you, the career of a very junior officer.

The fact that I wouldn't understand it is mere detail.

"How often have you been wrong in the merest detail?"

That's not just a mere detail, it's central to the question of whether the test is fit for purpose.

Reality is a mere detail "for others to clean up."

To him this last point was a mere detail, and he had already settled it.

"Why be personal over a mere detail of a political campaign?"

These are not mere details or points to be left for another day.

Unfortunately, as has already been pointed out, that is not a mere detail.

And then we stumbled onto something that was far more than a mere detail.