MIA: Encyclopedia of Marxism: Glossary of Terms
El
Eleatics
Ancient Greek philosophical school from 6-5th Century BC including Parmenides and Zeno, taught the immutable essence of true being and the illusory nature of all visible changes and differences, to counter the views of Heraclitus and others on the changeable basis of things. Belittled sense perception as the basis for knowledge, and posed the problem of expressing the contradictoriness of motion and change in logical concepts.
See Hegel on the Eleatic School.