For me it began as a bored student picking up a book on probability (specifically Randomness by Deborah Bennet) and discovering my understanding of probability was seriously wrong. Following that discovery and armed with my improved understanding I began to look at what other ideas and beliefs might be flawed. I started with those beliefs that were most likely to be based on probabilities and found that nearly everything I thought was true was affected by a single inaccuracy. My mind has burned with a single question ever since: "What else is polluting my mind?"

As for how I found OB; if I recall correctly I was reading up on AI and happened upon one of Eli's posts. Fascinated, I jumped from post to post and found myself deep in rationalist territory. I found home.