Or did she have some reason to believe he wouldn't use them?

You had reason to believe he would not live long.

We have every reason to believe they are all right.

I see no reason not to believe her, but these things should be reported.

Of course, no one had any reason to believe the film would be seen by anyone who was not at the meeting.

At least they said as much, I have no reason not to believe them.

He too had no reason to believe anything was wrong.

Right now I don't see any reason to believe you.

Years ago she'd had reason to believe the children she heard would be her own.

We also have good reason to believe they know we're watching.