 One of these concepts, "fa" (法 principle or method) was extended by the School of Names (名家 "Ming jia", "ming"=name), which began a systematic exploration of logic.The development of a school of logic was cut short by the defeat of Mohism's political sponsors by the Qin dynasty, and the subsumption of "fa" as law rather than method by the Legalists (法家 "Fa jia").Needham further notes that the Han dynasty, which conquered the short-lived Qin, were made aware of the need for law by Lu Chia and by Shu-Sun Thung, as defined by the scholars, rather than the generals.