Although repression, as a defense mechanism, is widely accepted as possible in psychology, the concept of repressed memories of and their storage in the unconscious mind, is widely questioned.

The answer is: Painful experience

Repression would make people who experience a certain trauma in their life to hide the painful experience deep in their subconscious. This would make them behave as if the trauma never happened in the first place.

For examples, many victim of child abuse experience this very psychological phenomenon. Since the children's mind were extremely distressed during their abuse, their brain will hide the experience as a coping mechanism to help the children survive the experience.

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )

sir frederic attributed inaccuracies to schemas. memory reconstruction is one part actual events and one part personal schema, which can result in inaccuracies when memories are reconstructed.