In Husserl's investigation of the "science of the life-world" a discipline which he himself founded, two sets of problems may be distinguished: one concerns the determination of the way in which the life-world has currency for an experience which belongs to the life-world but which comports itself to individual, inner-worldly things; the other concerns the attempt to determine how experience belonging to and moving within a particular sub- world simultaneously comports itself to the life world.