False knowledge may arise from wrong assumptions or world view, faulty information, or poor reasoning. False knowledge may lead to action with costly results. In fact, such knowledge may carry great risks because caution may be abandoned. Closely related to delusion and oftentimes inseparable from it is ignorance, particularly ignorance of ignorance. Ignorance means not knowing.
Illumination is the internal apprehension of the essential nature of the object of knowledge.
At one extreme, an experience or illumination may be ineffable, yet carry great conviction. At the other extreme, something may be explained, yet remain discounted. In contemporary culture, much that passes for knowledge is knowledge about, and not knowledge of. Humpty Dumpty may be deconstructed in a myriad ways, and represented in myriad ways. Humpty Dumpty is taken apart and recomposed again.