That's where the need for evidence comes in, and we have this in the resurrection accounts.
Three examples:
John 20:17 and Matthew 28:9 both mention women holding onto Jesus.
John 20:2 mentions more than one woman
Matthew says Jesus appeared to them in Galilee, Luke says in Jerusalem. John clarifies it was both, and we can conclude that the ending of Matthew is a later addition.
The resurrection accounts are all mutually inconsistent.
Matthew:The women meet Jesus in the garden on the morning of the resurrection. He instructs them to tell the disciples to meet him in Galilee.
The disciples go to Galilee on a mountain where Jesus tells them to go out and spread the word.
The End - not even an ascension.
MarkNo account
LukeThe women don't meet Jesus, but two followers who are going to Emmaus do meet him. They don't recognise him until they are having dinner in Emmaus. He vanishes
They immediately return to Jerusalem to the others (all on the same day so far). Jesus appears while they are relating the story and they have dinner.
Then Jesus leads them to Bethany (which is just outside Jerusalem, not in Galilee) and ascends to heaven.
Note that, at no time has anybody gone to Galilee, as Matthew claimed. Note also, that the timeline takes place over a single day.
JohnOn the first day, Jesus appears to Mary, then in the evening, to all the disciples except Thomas.
A week later he appears again to the disciples including Thomas.
Some time later he appears to the disciples again at the Sea of Tiberias (Galilee) which is not a mountain.
The End
ActsThe author starts by retconning his previous book by claiming that Jesus hung around for 40 days.
Then Jesus ascends from "the mount called Olivet" which on the way to Bethany from Jerusalem, according to Wikipedia.
The four accounts of Jesus' resurrection appearances are all different. It's almost as if the three authors were following Mark, but then Mark ran out after the empty tomb was discovered and so they each made up their own narrative.