"They also have the cognitive ability to talk about abstract issues," he said.

This is a deeply personal book that raises a big abstract issue.

University researchers are a good complement, because they tend to be focused on more abstract issues.

Public school prayer is more than an abstract issue of civil liberties in Alabama.

You say International law is a very abstract issue.

For me this is not an abstract demographic issue.

This is not an abstract issue to them, nor is it a matter that has long since been resolved.

This sounds like an abstract issue, but in fact it is highly concrete.

This is not an abstract issue but a very specific one.

Those are no longer abstract issues for a lot of us.