In the second half of the 5th century BC the name of sophist (from the Greek sophistês, expert, teacher, man of wisdom) was given to the teachers that gave instruction on diverse branches of science and knowledge in exchange for a fee.
Na segunda metade do século V deuse o nome de sofistas (do grego sophós, experto, mestre, home de sabedoría) aos mestres que daban unha instrución sobre diversas ramas da ciencia e o coñecemento a cambio dun salario.