Why Does Luke Appear to Contradict Himself?

A question has come from a reader, based on my recent post dealing with the apparent contradiction between Luke and Acts on the timing of Jesus’ ascension.   Do contradictions often result from authors editing several documents together and inserting them side by side in their work?  If different source documents have different views, that would create contradictions in the final product which embodies their amalgamation, no?  Here’s the question.

 

QUESTION:

I continue to be struck by how of...