If you had the all the info, how would you be certain that you are not biased? I had the unluckiness to be born in a country torched by war. I am still finding

If you had the all the info, how would you be certain that you are not biased? I had the unluckiness to be born in a country torched by war. I am still finding out the info about the war, that you won't be able to read anywhere. I am aware that it is not easy for someone that grew up and lives in totally different world to learn and understand all the complexities... But at least take everything with a grain of salt.