casual observer

Less chance of a casual observer seeing us that way, too.

It was as if she stood outside of herself, a casual observer.

To a casual observer, it would seem he actually lived there.

Or at least that was what it looked like to a casual observer.

But casual observers might not have even noticed the changes.

For my own part, I think there is more in the matter than the casual observer might imagine.

To even the most casual observer there may be more than one answer.

Somebody was watching him, more than just a casual observer.

The two little girls were difficult to tell apart, at least for the casual observer.