One of the many barbs often pointed at peak oil proponents is that they are constantly shifting the goal posts. Peak oilers are accused of changing the definition of what peak oil actually means, therefore the entire concept of oil production peaking is rubbish. Far from a valid criticism however, this is actually a scientific virtue. If any scientist dogmatically stuck with a rigid theory as the data repeatedly proved that theory to be incorrect then that would be cause for great concern. The fact however that peak oil theory has developed markedly since Hubbert Peak Theory in 1956 shows that peak oil proponents are willing to listen to the data and change accordingly. This is the basis for the entire scientific method: form a question, create a hypothesis, test the hypothesis, analyse the results and alter the hypothesis if required and then test again. This is the most successful framework that humanity has developed so far in order to further human scientific knowledge.