Hybrid (biology) are the mule, a cross between a female horse and a male donkey, and the hinny, a cross between a female donkey and a male horse. Pairs of complementary types like the mule and hinny are called reciprocal hybrids. Among many other mammal crosses are hybrid camels, crosses between a bactrian camel and a dromedary. The first known instance of hybrid speciation in marine mammals was discovered in 2014. The clymene dolphin ("Stenella clymene") is a hybrid of two Atlantic species, the spinner and striped dolphins. Cagebird breeders sometimes breed bird hybrids known as mules between species of finch, such
When a white horse is not a horse When a white horse is not a horse When A White Horse Is Not A Horse (), also known as the White Horse Dialogue (), is a famous paradox in Chinese philosophy. Gongsun Long wrote this circa 300 BC dialectic analysis of the question 'Is "white horse not horse" permissibly assertible?'. The White Horse Dialogue ("Baima Lun") constitutes chapter 2 of the eponymous "Gongsun Longzi" "Master Gongsun Long", who was counted among the "School of Names" (aka "Logicians" or "Dialecticians") in the Hundred Schools of Thought. Most of Gongsun's writings have been lost and the received "Gongsun Longzi" text only