Observation is the generative act in scientific discovery. For all its aberrations, the evidence of the senses is essentially to be relied upon provided we observe nature as a child does, without prejudices and preconceptions, but with that clear and candid vision which adults lose and scientists must strive to regain.
By the late 1930s all nationalist movements had generated [[w:Historiography|historolographical writing. Poetry , essays , plays , and fiction , as well as aural and visual representations ( maps , cartoons , lithographs , sculpture , songs , film); all were generative of politically infused historical consciousness .
Thought is valuable in proportion as it is generative.Lytton