A Consistent Question

If you want to 'see' that a certain system of rules, axioms, organisations, beliefs, and practices is consistent, you will need to stand outside this sytem, either physically or metaphorically (that is, in your imagination). Right? Now if you want to 'see' that you are rational, you would therefore need to be irrational or non-rational now and then, so that these occasional bursts of irrationality or non-rationality would be the exception that would prove the rule. Right? Or left?