This is not to question Jordan's sincerity, by any means.

When he says something, when he looks in your eyes, you just don't question his sincerity.

She looked at him dubiously as if questioning his sincerity.

Some also question his sincerity about human rights reforms.

We may question their sincerity: the depleted oil wells they use for this purpose are all in Poland.

He says this straight up, soberly, so that even I could not question the statement's sincerity.

I no longer feel compelled to question their sincerity.

The spirits may question your sincerity - but only at first.

Fleming replies: "No one in this room will question your sincerity."

She cries, but because Rebecca has had a wall up since the competition began, some of the girls question her sincerity.