#30in30 – Two Bags of Marbles

You are presented two bags. One contains 700 red chips and 300 blue chips, while the other one is opposite with 700 blue chips and 300 red ones. You are given the choice between the bags. Take one and begin to sample with replacement. In twelve samples, you get 8 reds and 4 blues. What…

#30in30 – Fooled by Fundamentals

(Reading time: 2 Min read)

The Base Rate Fallacy is a formal fallacy. It occurs when too little weight is placed on the probability base rate of an event. People are succumbing to the base rate fallacy when erroneously judging the likelihood of an event without taking into account all the relevant data. The underlying mechanism is an overt focus on new information without acknowledging how this impacts the original assumptions. Old information is still evaluated and taken into account, however the newer pieces of information are given too much weight.