I remember in episode 136 itachi showed madara's flashback to sasuke this is my first point.
next is sasuke saw madara's physical appearance in flashback shown by itachi.
taking in consideration both these points i mean to ask if tobi was sure that sasuke would believe him as madara when tobi opened his mask and showed his face to sasuke. sasuke saw madara's appearance but yet he believed tobi is obito
this means tobi handled things so carefully that sasuke couldd not have a point of doubt on him.
do you agree? or not ? explanation please?