Contradiction with 1 Corinthians 15:5
While John 20:8 describes the belief of the disciple without seeing Jesus, this verse emphasizes that Jesus was seen by Cephas (Peter) before others believed.
1 Corinthians 15:5: And that he was seen of Cephas, then of the twelve:
Contradiction with John 20:24-25
In contrast to the belief of the disciple in John 20:8, these verses describe Thomas's doubt and need for physical proof before believing.
John 20:24-25: But Thomas, one of the twelve, called Didymus, was not with them when Jesus came.
Contradiction with Luke 24:11
Unlike the belief shown in John 20:8, this verse depicts the apostles' initial disbelief of the women's report of Jesus' resurrection.
Luke 24:11: And their words seemed to them as idle tales, and they believed them not.
Contradiction with Matthew 28:17
While John 20:8 demonstrates belief upon seeing the empty tomb, this verse mentions that even when seeing Jesus, some doubted.
Matthew 28:17: And when they saw him, they worshipped him: but some doubted.