Thanks for that example. I looked up both verses and this is what I think;
In John 13:36, Peter does ask Jesus where he is going. Jesus response intially to his Q is "where I am going you cannot follow now", instead of telling Peter where it is he was going.
Now, instead of Peter asking where is it that you are going that I cannot follow?, which would be repeating the Q again, he turns the conversation to a whole other topic, in verse 37 He asks "why can't I follow you now? I will lay down my life for you". Here he is saying I am worthy to follow you anywhere so why can't I go where you are going?
Peter was being so confident in himself and that he would die for Jesus even at that moment, when Jesus knew in fact he would not. Therefore, instead of addressing the where are you going? Q, Jesus instead responds to the assurance of Peter in laying down his life for Jesus and lets him know, he will not only NOT lay down his life, but will actually deny Jesus three times. Therefore the Q was not answered as to where Jesus is going.
Now to the other verse in John 16. Prior to John 16:5, Jesus is telling his disciples how they will be treated when he is gone, how they will be hated on account of his name and how they will even be put out of the synagogue and even killed when he goes to his father which the time to do so will be very soon - this would have been another good opportunity to ask him "well, where are you going? But because they were upset and afraid at what Jesus told them would happen to them, none of them asked this question again. And now the time was imminent that Jesus would in fact return to the father. Thus Jesus says to them "Now, I am going to him that sent me, yet none of you asks me, where are you going? (John 16:5).
This is different from the previous verse where this Q was asked entirely. In the John 13:36 Peter asked Jesus where he was going in reference to the statement "where I am going, you cannot follow, but you will follow later".
In verse 16:5, since Jesus gave them information that upset them and made them afraid, they did not want to know where he was going as his leaving would make all the things he told them would happen to them come true. In John 16:5 Jesus not only states he is going to his father as he did in John 13:36 but he now states the urgency of it by stating "Now, I am going to him that sent me, yet none of you asks me, where are you going?
In other words his Q is really "Now, at this time when my return to my father is imminent, none of you are asking (again) where I am going?"
These two accounts should not be strung together as if they are one and we need to see what is going on around the disciples at the time each Q is asked, in other words the context of the Q's and the circumstances surrounding them. Looking at both accounts, there really is no discrepancy here at all. .
But this is what I am seeing, everyone will have to read it and decide for themselves.