Sentence examples for that is a mistake from inspiring English sources

SPEER: No, that is a mistake.

But if they declare their superiority, that is a mistake — that's why I dislike journalists.

"Donors tend to go where there is the most disease and with malaria that is a mistake," he warns.

That is a mistake.

Clearly that is a mistake.

History suggests that is a mistake.

Sorry, that was a mistake.

In retrospect, that was a mistake.

That's a mistake.

And that was a mistake.

But that's a mistake.