It would be hard, to review over the past histories without the bias, because, IF you’re human, then, you’re bound, to carry some form of biases.
Reviewing over past histories without the bias, by focusing solely, on the facts of events that had happened, without ANY amount of personal emotional input, but, how? You are, human, aren’t you? Therefore, you’re bound, to have an opinion on things, and, having an opinion makes you biased.
Reviewing over past histories without the bias, so, we just focus on the facts, is that it? But, how do you know, what’s written down, being reported are actually factual and not opinions, because, opinions may easily be mistaken as facts.
Reviewing over past histories without the bias, only if you can, step OUTSIDE of yourselves, and start, reexamining the relationship that you’d shared, with the outside world, with, absolutely NO personal feelings, emotions, opinions, or other forms of inputs, and that, would not be done easily, unless, you don’t have an opinion, you don’t favor one thing over another, you don’t have personal preferences on things, but, you do, so, reviewing over the past histories without the biases simply, can’t be done at all, can it??? Nope!