# Conditional Probability, Fast and Slow

Now more than ever, weâ€™re bombarded with terms like â€śsensitivityâ€ť or â€śspecificityâ€ť in relation to Covid-19 tests. It turns out that to understand these, you first need to understand conditional probability.

Because common sense intuition can be often misleading, I will walk you through a conditional probablity problem about Blue and Green cabbies from the book Thinking, Fast and Slow.

20 March 2021