How does memory work?

You ask: How memory work?

When Caveman live a moment, many brain cells fire together at once — and Caveman head hold near eighty-six billion of these tiny cells. Cells that fire together grow stronger link, like path stamped through tall grass — walk it again, the path get wider. That link IS the memory. Small cave near middle of brain (hippocampus) hold new memory fresh, then during sleep move it out to the big brain-hills for long keeping. But here the trick: brain not store memory like carving on rock. Each time Caveman remember, brain rebuild it from pieces — and can slip wrong pieces in. So old memory bend and change every time Caveman pull it up. Cave wisdom: memory not a stone carving Caveman read back — memory a path Caveman walk fresh each time, and path shift under foot.