Force immersion

Force Immersion was a unique ability among the Fallanassi people, which allowed them to use the White Current to render themselves undetectable by any means, organic, artificial (amazingly), Force-based or otherwise. Only a strong mind, and only after carefully scrutinizing the area, could possibly be able to pierce the Immersion technique, unless the Fallanassin in question were to interact with the people being fooled by the technique.