causality
2 free lessons tagged causality across Business, Programming. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.
Why before-and-after fools you
You change the button, sales rise, you conclude the button worked, and you may be completely wrong. Learn why comparing before and after is one of the most reliable ways to fool yourself, what a controlled experiment does differently, why randomization is the whole trick, and how the A/B test turns a guess about cause into something you can actually measure.
Failure and Time in Distributed Systems
Distributed systems break in ways single machines don't: nodes crash silently, messages vanish, and clocks lie. Learn the standard failure taxonomy, why a global clock is physically impossible, and how Lamport and vector clocks let you reason about causality without one.