Sentence examples for this a mistake from inspiring English sources

Is this a mistake?

Pavel thought this a mistake.

"I thought, 'Is this a mistake?

Was this a mistake on top of a mistake?

After a while, you can't call this a mistake.

Was this a mistake by the kitchen or did the waiter misspeak?

We think this this is a mistake.

This was a mistake; this was all a mistake.

This is a mistake.

But this is a mistake".

Some insist that this is a mistake.