I wanted to argue it on a sort of theoretical level.

He could see that she did, if only on some theoretical level.

At a theoretical level there remain some problems with this analysis.

It is true that the question remained at a rather theoretical level in the 1860s.

He knew that they had learned, at least on a theoretical level, how to handle the boat.

There's no doubt that there is a theoretical level of commitment around here.

For various reasons few were ever built, and their main interest is on a theoretical level.

Still, they may not be easy to sell on the theoretical level.

Thus there is little evidence to support them beyond the theoretical level.

The issue is very simple, therefore, on a theoretical level.