A memoir should be written in the tone of a non-fictive factual essay.

The correct answer is 'False'.

A memoir is a non-fiction that tells your own story, focusing on elements of your real life like personal experiences, intimacy, and emotional truth. So, the above statement is 'truth'. The writer can include everything which he experienced in life or omit some which never wants to disclose with the readers. But no imaginary things are added in a memoir.