Aristotle considered the existence of  these entities absurd in his On Generation and Corruption, which claims that they were first postulated to address the  possibility of (*) change.  
These entities underlie a theory of natural history found in the Syntagma Philosophicum. One thinker attempted to  undermine a paradox about these entities by claiming that "all perception is true." Under one theory, these entities did not  explain properties that exist "by convention," but instead explained only "reality." Aristotle considered the existence of  these entities absurd in his On Generation and Corruption, which claims that they were first postulated to address the  possibility of (*) change.  These entities, which are central to Pierre Gassendi's theories, "swerve" to meet one another, thus  explaining free will, according to Epicurus. For 10 points, name these indivisible entities that exist in a void, which make up all  matter, according to Leucippus and Democritus.
These entities underlie a theory of natural history found in the Syntagma Philosophicum.
atoms [accept word forms]