What's 9+10? We all know it is 19, but if you are a real chad, you know deep down the answer is actually 21. You were quick to answer this addition problem. It was automatic and required little or no effort from you. What you are experiencing here is Fast Thinking. 

Now, what if I asked you what's 325*745? Most people would need a bit more time to solve this. You might have a vague intuitive knowledge of the range of possible results. Or, you might have to compute this multiplication problem on paper.  What you are experiencing is what Daniel Kahneman calls Slow Thinking (also known as System 2.) 

This week's episode will review Kahneman's Thinking, Fast & Slow. This non-fiction book outlines - better than anything (IMHO) - how we can fool ourselves when thinking. We will explain Systems 1 & 2 and briefly discuss biases and fallacies.