mne-, mnem-, mnemon-, mnes-, -mnesia, -mnesiac, -mnesic, -mnestic +

1. A distortion of memory in which fact and fancy are confused.
2. Disordered or perverted memory; especially, of the meaning of words.
3. False recollections, as of events that have never occurred.

Impairment of memory that is characteristic of old age.

1. Memory of the future or the paradoxical sensation of recollecting a scene which is only now occurring for the first time.
2. Term referring to the phenomenon of déjà vu, "already seen".

Science fiction is usually where examples of promnesia are found

One of the best examples of promnesia is found in novelist Morgan Robertson's novel, Futility, printed in 1898.

Published fourteen years before the ship named the Titanic sank in history's most famous marine disaster, the novel told of a great "unsinkable" luxury liner named the Titan which sank on its maiden voyage after hitting an iceberg, with the loss of almost all of its passengers because there weren't enough lifeboats aboard.

There were at least ten other promnesias in the novel which were applicable to the real tragedy which took place with the Titanic; and remember, the novel was published fourteen years before the actual disaster!

A patient's belief in having a clear recollection of events that have never taken place or of things that have never existed; literally, a false memory.

Poor memory for events of a long or distant past.

In psychiatry, acquiring consciousness of matters held in the memory of another person.