 Thus, according to the Stoic theory, once it is shown that there are no cognitive impressions as they define them, if there are any wise people, they will have no beliefs; and, whether there are any wise people or not, it is never rational to assent to any impression. (See, e.g., Sextus M 7.150–7 &amp; Cicero Ac. 2.66–8 &amp; 2.77–8).