I WISH I COULD FORGET THE EVIL DEEDS DONE TO ME BY A SELECT FEW "Sleep may help us to forget by rebalancing brain synapses "| Science | The Guardian

".... According to another hypothesis, sleep plays the vital role of restoring the right balance of brain synapses to enhance learning, and two studies published in today's issue of Science now provide the most direct evidence yet for this idea.
We do know that..."

https://www.theguardian.com/science/neurophilosophy/2017/feb/03/sleep-may-help-us-to-forget-by-rebalancing-brain-synapses