The other, somewhat subtler point, was that interface is very important.

Don't overlook the subtle point he makes about "one caring person just asking".

A subtle point undoubtedly lost on the likes of anonymous.

The linkage is so provocative that more subtle points are lost.

A tiny, subtle point, perhaps, but could it be significant?

Just enough, maybe, so they would give way on a subtle point or two.

It's one of those subtle points that turn out to be not worth insisting on.

But it was not a moment to argue subtle points.

Did no one discuss subtle points of interpretation with him?

There is another, more technical reason, involving some subtle points.