It's an "expression of agreement that is not supported by real conviction."

"Quite splendid," he said, more to be saying something than out of any real conviction.

Harris shook his head again, but now without real conviction.

This isn't a hypothetical case, it was a real conviction.

This is exactly what one may expect when decisions are made politically and with little real conviction.

"Stop looking at me like that," she said, but there was no real conviction in her tone.

But there was no real conviction in his voice.

The few I got to talk to had no real convictions in the matter.

"You could tell there was no real conviction," he said.

So personal opinions expressed on a blog site shouldn't be repeated as evidence of our real convictions?