A bias is not bigfoot. You can clearly prove that there is fairness (&quot;no bias&quot;, but we can phrase your negative as a positive) by simply showing that things are equal. All you have to do is count males and females and show that they are equal.<p>If things are not equal, you can still prove that there is no bias by asking the disadvantaged group for their opinion. It&#x27;s not like polling this group is impossible.