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Clairsentience powers enable you to learn secrets long forgotten, to glimpse the immediate future and predict the far future, to find hidden objects, and to know what is normally unknowable.
For the purpose of psionics–magic transparency, clairsentience powers are equivalent to powers of the divination school (thus, creatures immune to divination spells are also immune to clairsentience powers).
Many clairsentience powers have cone-shaped areas. These move with you and extend in the direction you look. The cone defines the area that you can sweep each round. If you study the same area for multiple rounds, you can often gain additional information, as noted in the descriptive text for the power.