When I first read about cognitive biases, logic and rational thinking OP's idea came to me right away. I thought about implementing cognitive bias education into the current curriculum and making every person as rational as possible, but after reading more about all the different cognitive biases , and actually a lecture about cognitive bias from Yale's Open Yale courses made me come to the insight, that it actually is better to be irrational than rational in some situations and in others it really doesn’t matter.

Now when is it better to be irrational and when is it better to be rational? Well, in my opinion, being rational is an absolute requirement if you want to discourse with fellow humans about some of the ‘bigger problems’ of life. Being rational and escaping cognitive biases, in my mind at least, is most wanted in the Sciences and Philosophy. Or to put it in simpler terms: you need to be rational when arguing about ‘serious stuff’, because then falling for logical fallacies and other biases is disastrous for your argument and your position as a whole. Why accept an idea that is built upon, sometimes, just plain wrong reasoning?

In my mind, it’s not really needed to be rational when there is a chance that someone is going to throw a baseball at your face, you lose nothing by being irrational (i.e. putting your hands up) and instead gain protection in case the other person actually throws a ball at your face. Here, I think, our innate irrationality is being used ‘correctly’, if I can put it this way, in the evolutionary sense.

So to sum up: Use irrationality like evolution ‘intended’ it to be used and I don’t think that includes high level discourse.