He had to find an argument to beat down the Congressmen's irrational hopes of paradise.

She had a mad, irrational hope that, after all, Emily might be able to clear herself.

I found myself with an irrational hope for evidence to sustain that reaction.

A faint, irrational hope had begun to dawn in Ross's mind.

I knew one wild moment of irrational hope that the Fool, too, would somehow be there.

"I don't think so," he said, but felt a touch of irrational hope anyway.

But is a return to outsized earnings growth a reasonable prospect or an irrational hope?

I had the irrational hope that you might be willing to lend me some assistance.

Any hope, however irrational, that she and her companions might outrace the pack was gone.

There for a moment, she had been full of irrational hope.