All thinkers then agree in making the contraries principles, both those who describe the All as one and unmoved (for even Parmenides treats hot and cold as principles under the names of fire and earth) and those too who use the rare and the dense.
parmenidesquotes
Refuting a merely contentious argument — a description which applies to the arguments both of Melissus and of Parmenides: their premises are false and their conclusions do not follow.