Survivorship bias is judging from the winners you can see while the failures stay invisible — so success looks easier and more repeatable than it is. Examples:
What is survivorship bias? Read the full idea →Everyone cites the few billionaire dropouts and forgets the millions who dropped out and didn't — the survivors are loud, the rest are silent.
The flimsy old buildings already fell down. Only the sturdy ones survived to be admired, making the past look better-built than it was.
Books by people who made it share the habits of survivors — but plenty who failed had the exact same habits. The habit may not be why they won.
The classic case: engineers wanted to armour where returning planes had bullet holes — until someone noted the planes hit elsewhere never came back. Armour the gaps, not the holes.
The happiest and angriest customers post; the quiet, average majority don't — so the reviews you read aren't the experience you'll get.
That's just how memory works. Lock survivorship bias in with a 5-minute active-recall session — spaced repetition, no signup.
Try this idea free →One tap adds it to your review queue — we bring it back right before you'd forget.