How did Jack Dorsey get the idea for Twitter ? Link : twttr ( From the horse’s mouth ) : On May 31st, 2000, I signed up with a new service called LiveJournal. I was user 4,136 which entitled me a permanent account and street cred in some alternate geeky universe which I have not yet visited. I was living in the Sunshine Biscuit Factory in Oakland California and starting a company to dispatch couriers, taxis, and emergency services from the web.

  I have made it a rule to adopt the method of ignorance in my investigations into instincts. I read very little. … I know nothing. So much the better : my queries will be all the freer, now in this direction, now in the opposite, according to the lights obtained. -- Jean Henri Fabre

A biologist, a physicist, and a mathematician are sitting at a sidewalk cafe watching a house across the street. After a while two people enter the house. A little later, three people exit. ‘Reproduction,”says the biologist. ‘Measurement error,” says the physicist. ‘Hmm,” says the mathematician, ‘If a person enters the house it will be empty again.”

Failures / Errors when analyzed always makes oneself better. Such a simple statement has lead to the development of one of the most profound theorems in statistics. Here is a little note on how Central Limit theorem, a theorem which almost everyone intuitively uses, came to existence: “The Central Limit theorem was originally stated and proved by French Mathematician Pierre Simon, who came to this theorem from his observations that errors of measurement tend to be normally distributed.

Suppose you have agreed to settle a dispute with cousin Joe by tossing a coin. The problem is that neither of you has any change. Joe suggests that you instead toss a bottle cap, which will count as heads if it lands with the top up, and tails otherwise. As you cannot assume that these are equally likely, is there any way in which fairness can be guaranteed? -————– Solution :