un·bi·ased 
/ˌʌnˈbajəst/ adjective
/ˌʌnˈbajəst/ adjective : not having or showing an unfair tendency to believe that some people, ideas, etc., are better than others : not biased
▪ an unbiased [=impartial] judge ▪ Let me offer an unbiased opinion.
▪ an unbiased [=impartial] judge ▪ Let me offer an unbiased opinion.
