Sentence examples for a mistake is a mistake and from inspiring English sources

The phrase "a mistake is a mistake and" is correct and usable in written English.
It can be used to emphasize that an error should be acknowledged as such, often in discussions about accountability or learning from errors.
Example: "In our team meetings, we often remind ourselves that a mistake is a mistake and we should learn from it rather than dwell on it."
Alternatives: "an error is an error" or "a fault is a fault".