Are biased sources helpful for historians?

Like if a historian gets a biased source is it useful for him? or:Like if a historian gets a biased source is it useful for him?or:All sources are bia

Like if a historian gets a biased source is it useful for him?

or:Like if a historian gets a biased source is it useful for him?


or:All sources are biased. For example, history is only told by the winners.

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