She told me she ran into my long-lost brother at the grocery store — would you believe it?

After interviewing survivors of cults, she concluded that true believer syndrome can persist despite contrary evidence.

I found a first edition of that book in a thrift store, would you believe?

I told everyone I'd finish the project ahead of schedule, and when I turned it in early, you better believe it, they congratulated me.

When I told everyone I'd completed the project in one night, you'd better believe it—they didn't think I could do it.

To believe one's ears after such a shocking announcement is almost impossible.

During our late-night conversation, she suddenly asked, do you believe in God?

When a person walks into the renovated gallery, it's hard to believe one's own eyes.

To be unable to believe one's eyes is exactly how people felt when they saw the statue's lifelike features.

He rolled his eyes and muttered, "I believe you, thousands wouldn't," when she insisted that everyone in town had paid to see her show.