One of your primary five senses is highly developed, allowing you to spot what others miss. You may make Perception Tests to detect normally imperceptible details with the associated sense, as dictated by the GM. This could include seeing a lone Servo-Skull at an incredible distance, detecting the presence of a near-odourless poison, hearing the breath of a motionless ganger hidden in the next room, reading printed text by touch, or knowing by taste alone that two ration packages come from different manufactorums.