Though I hope you're not referring to the fact Lelouch contradicted himself by saying or doing something at one point and then proceeding to say or do something different later, because that's less of a contradiction in the plot and more of a contradiction in his character.
Which can usually be explained away relatively easily (humans...are contradictory beings? No!), even if it's not exactly pretty.
Can't pretend I haven't already done my own re-watch, but...
Though I hope you're not referring to the fact Lelouch contradicted himself by saying or doing something at one point and then proceeding to say or do something different later, because that's less of a contradiction in the plot and more of a contradiction in his character.
Which can usually be explained away relatively easily (humans...are contradictory beings? No!), even if it's not exactly pretty.