There is little historical evidence of Lie Yukou as a Hundred Schools of Thought philosopher during the Warring States period.
This could be due to the burning of books and burying of scholars which occurred during the reign of Qin Shi Huang.
His full name was Lieh Yü-k'ou, and it appears that he was living in the Chêng State not long before the year 398 BC, when the Prime Minister Tzu Yang was killed in a revolution.
This theory is rejected by the compilers of the great Catalogue of Ch‘ien Lung's Library, who represent the cream of Chinese scholarship in the eighteenth century.
Still, the mere attempt at such a holocaust gave a fine chance to the scholars of the later Han dynasty (A.D. 25-221), who seem to have enjoyed nothing so much as forging, if not the whole, at any rate portions, of the works of ancient authors.