Objective word of God

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Someone said to me that the Bible isn't objective because it is written subjectively.(men wrote down what they subjectively saw) They used the 4 gospels as an example stating that the accounts differ because of what those writers subjectively experienced.They said that if the bible was objective,all 4 accounts would be exactly the same. My thought on this is that the writers were inspired and that is what makes the word objective. But then why are the accounts different if they were inspired?