maybe computers are already smarter than us

Credit card fraud detection is amazing.

I spent months booking hotels, plane tickets, train tickets, and random events online. Then I travelled around the world, using the card left and right, and I never got declined. (Granted, I told them the countries and the rough timeframe.)

Yesterday, someone tried to spend $1031 and $435 with my card number online, and the bank promptly flagged my account and disabled my card.

I don't know how they tell the difference.