Contradiction with Luke 22:23
This verse describes a similar event where the disciples questioned among themselves, but it does not imply doubt about who was the betrayer; rather it suggests a collective questioning, which might not directly contrast, but shifts the emphasis.
Luke 22:23: And they began to enquire among themselves, which of them it was that should do this thing.
Contradiction with Matthew 26:22
This describes the disciples being "exceeding sorrowful" and asking "Lord, is it I?" The contradiction might be in the emotional reaction, suggesting sorrow and introspection rather than confusion or doubt.
Matthew 26:22: And they were exceeding sorrowful, and began every one of them to say unto him, Lord, is it I?
Contradiction with Mark 14:19
Similar to Matthew 26:22, it records the disciples asking "Is it I?" indicating a personal concern and self-reflection rather than just doubt about another, which may suggest a contrast in the emotional response portrayed.
Mark 14:19: And they began to be sorrowful, and to say unto him one by one, [Is] it I? and another [said, Is] it I?