Re: How Minato Beats Itachi. Scenario.
This thread shouldve died, however thsi is what ill say, both opponents are smart enough to outsmart the other.
Just read what Karin is thinking as this will make things clear
In karin's case being a sensor she can know much more clearly if she is under an illusion.
There is another way which is attention to detail;
Sasuke saw right through c's illusion because of the sharingan's insight, the sharigan saw right through it. Juugo thought sasuke has been taken out by darui/A, however that was an illusion, which sasuke saw right through it due to the attention to detail the sharigan allows. Obviously this ability is easy when you wield a doujutsu, however when you dont you have to rely on your intelligence and note the slightest of inconsistency which gave away the illusion
Hope that address that section.
Next the ability to break an illusion when you are not involved is easy and that is what jiraiya did its called the partened method, when your ally is in an illusion you insert your chakra and bla bla bla. However when the person them self is in the illusion then life becomes hard.
Not getting involved however just becaue jiraiya used the partened method which is the best method for evading genjutsu, especially sharingan genjutsu doesnt mean that if he is stuck in one or somebody else then can easily get out of it. Orochimaru, couldve done what jiraiya did and disrupted the girl's illusion, however when he himself was in one, that is when life became hard.
NOT getting involved, just addressing issues that is incorrect