Sheldon
Veteran Member
By the time that Luke was written there would have been almost no eyewitnesses left and no reason to believe that the author of Luke talked to any. It was hearsay or oral tradition, whichever you prefer by then.
supportive documentation?
LINK "Most scholars date the composition of the combined work to around 80–90 AD, although some others suggest 90–110, and there is textual evidence (the conflicts between Western and Alexandrian manuscript families) that Luke–Acts was still being substantially revised well into the 2nd century."
2nd SOURCE "The Gospel According to Luke, written in roughly 85 C.E. (± five to ten years), most likely during the reign of the Roman Emperor Domitian, is known in its earliest form from extensive papyri fragments dating to the early or middle of the third century."