Question 1: Explain why a historian might not think that this passage provides enough evidence to understand the role of railroad workers during this strike in Columbus?

As you did not provide the passage in question, I will give general reasons why a historian might not think a source provides enough evidence for an event or why the source may be unreliable.

A historian will generally not think a source presents enough evidence if:

the creator of the source was not there when the event happened.the creator of the source is not a reliable authority on the events described by virtue of being professional educated in it. the source is not fact-checked by professionals the source presented an opinion instead of fact

In conclusion, if the passage in question had any of these qualities, a historian might not think it provides enough evidence to enable one to understand the event in question.

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Word of mouth.

Good luck : )