Heuristics and biases

Human reasoning is subject to a long list of biases. Why did we evolve such faulty thinking processes? Aren't false beliefs bad for survival and reproduction?

Many researchers suggest that while humans are poor at formal logic and Bayesian inference, humans display a kind of 'ecological rationality'.

Other researchers think that our rationality is a direct result of our need to convince others that we're right, and that many of our biases (e.g. confirmation bias) are a direct result of this. http://www.edge.org/documents/archive/edge342.html

Edit - please disregard this post