Until the early modern era, much of the discussion which has survived today concerning nous or intellect, in Europe, Africa and the Middle East, concerned how to correctly interpret Aristotle and Plato. However, at least during the classical period, materialist philosophies, more similar to modern science, such as Epicureanism, were still relatively common also. The Epicureans believed that the bodily senses themselves were not the cause of error, but the interpretations can be.