What's the most useless thing you still have memorized?
The mitochondria is the powerhouse of the cell.
Row Row Row Your Boat - in Latin
My childhood phone number from the 60s which is now my wifi password.
“Mares eat oats and does eat oats and little lambs eat ivy” even though I have no idea what that means.
ROY G BIV - red, orange, yellow, green, blue, indigo and violet … colors of the rainbow.
The quick brown fox jumps over the lazy dog.