Every term is defined twice: once the way a filing would put it, and once the way somebody would explain it to you across a table. The second one is usually the one that sticks.
Showing 2 terms
Drawing conclusions from surviving examples while ignoring those that failed and disappeared.
Twelve winning screenshots mean nothing without the denominator. You never see the accounts that stopped posting.
A dataset recording what a universe actually was on each historical date, including the companies that were later merged away, delisted or suspended.
What fixes survivorship bias, and what retail platforms almost never have. Knowing your data lacks it is worth more than any amount of care with the rules.