These are interesting notions: mystical and powerful ideas with an almost religious appeal.

That's an interesting notion, but I can't see that happening.

"That's an interesting notion," Stone said, and he meant it.

We fell silent for a while, and then an interesting notion hit me.

He thought for a moment and came up with an interesting notion.

I can't offer you a proven method but it's an interesting notion.

This is an interesting notion and probably at least partly true.

It was an interesting notion, but I didn't really take it seriously even now.

It is an interesting notion that might not be adaptable to all cases.

An interesting notion, and one he might make use of one day.