- Human: Extensive practice in studying patterns of Human behaviour, allowing one to notice when someone is lying, hiding something, or acting strangely. This skill is often used to oppose Rapport (Deception).
- Group (Various): As above, but for a group of people who are partly or entirely something other than Human. This includes heavily augmented Tech-priests, Space Marines, or even Xenos.
- Surroundings: Training in learning to continually read the surrounding environment, noting unusual mistakes in layout, furtive steps, concealed shapes, or ominous patterns of behaviour which indicate something is wrong.
Intuition is the skill used when noting that something seems amiss with a person or place. It is used for reading social cues and body language, as well as noticing when the arrangement or the feel of a location is somehow wrong. Those trained at recognising when something is off can use the errant subtleties to discern something of what is actually going on. This skill covers detecting body language or similar patterns of behaviour. Examples include recognising social missteps or noting when the ceremonial murals have been hung incorrectly.