 Melissus, dismissed as a simple-minded thinker by Aristotle (and by some contemporary scholars as well but see Makin 2005), expands Parmenides’ arguments about the nature of what-is (Palmer 2004). It is Melissus who explicitly claims that only one thing can be: if what-is is unlimited (as he thinks it is), it must be one and all alike (if there were two [in number or in character] they would be “limited against each other” DK30B6/LM21D6). Melissus specifically argues against the empty (the void), and rejects the possibility of rearrangement (which would allow for the appearance of coming-to-be and passing-away, and of movement)—all these characteristics are incompatible with the unity of what-is (i.e., the One). Melissus thus claims that what is real is completely unlike the world that we experience: the split between appearance and reality is complete and unbridgeable.