This is unaffected by the style of writing, whether in verse or prose. Another saying worth remembering here is that history is often stranger than fiction. What actually did happen in the past is less intelligible to us than what might have happened. Finally, we must consider the distinction between poetical and logical truth. When we think that something is logically true, we must also think that what is contrary or contradictory to the proposition we judge to be true must be false.
Logical truth is exclusionary.
Poetical truth is not exclusionary. For example, among the Greek tragedies there can be many stores about Clytemnestra and Electra, all different but all poetically true.