Question: Who thought atoms and the void comprised all of reality?

context: No context provided
question: Who originally thought atoms and the void comprised all of reality?
short_answers: Democritus
context: Epicurus (341–270 BCE) studied atomism with Nausiphanes who had been a student of Democritus. Although Epicurus was certain of the existence of atoms and the void, he was less sure we could adequately explain specific natural phenomena such as earthquakes, lightning, comets, or the phases of the Moon (Lloyd 1973, 25–6). Few of Epicurus' writings survive and those that do reflect his interest in applying Democritus' theories to assist people in taking responsibility for themselves and for their own happiness—since he held there are no gods around that can help them. He understood gods' role as moral ideals.
question: Who, as a student of Democritus, thought atoms and the void comprised all of reality?
short_answers: Epicurus
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question: Who is the mentor thought atoms and the void comprised all of reality?
short_answers: Leucippus
context: In the 5th century BCE, Leucippus and his pupil Democritus proposed that all matter was composed of small indivisible particles called atoms. Nothing whatsoever is known about Leucippus except that he was the teacher of Democritus. Democritus, by contrast, was a prolific writer, who wrote over eighty known treatises, none of which have survived to the present day complete. However, a massive number of fragments and quotations of his writings have survived. These are the main source of information on his teachings about atoms. Democritus's argument for the existence of atoms hinged on the idea that it is impossible to keep dividing matter for infinity and that matter must therefore be made up of extremely tiny particles.
question: Who is the pupil thought atoms and the void comprised all of reality?
short_answers: Democritus

Answer: Several philosophers thought atoms and the void comprised all of reality. The Ancient Greek pre-Socratic philosopher Democritus, a pupil of Leucippus, originally did. In the 5th century BCE, Democritus and his mentor, Leucippus, proposed that all matter was composed of small indivisible particles called atoms. As a student of Democritus, the ancient Greek philosopher Epicurus also believed atoms and the void comprised all of reality.