Although oil paint was first used for Buddhist paintings by Indian and Chinese painters in western Afghanistan sometime between the fifth and tenth centuries, it did not gain popularity until the 15th century.
Definition of distinction - a difference or contrast between similar things or people, excellence that sets someone or something apart from others Definition of distinction - a difference or contrast between similar things or people, excellence that sets someone or something apart from others dictionary thesaurus
A distinction without a difference'' is a way of referring to an artificial or false discrimination. I think we need the sentence before this one to give a clear explanation. Is it about increasing human intelligence, or something like that?