If you look at it this way, then you would need to have a timeout element associated with each entry. In neuroscience, long term memories are formed by neural g

If you look at it this way, then you would need to have a timeout element associated with each entry. In neuroscience, long term memories are formed by neural genesis in hippocampal region - meaning new synapses form upon reinforcement learning. These connections decay over time, which means you slowly start "forgetting" things. If the timout is a small value and there is no stimulus to increase it, we will quickly forget leading to short term memory.