  Aristotle expends great energy in investigating what in reality makes true statements true, but less investigating the nature of truth-bearers themselves. In his most significant discussions of truth and falsehood, he seems not to take a clear stand on the question of propositions. In On Interpretation 1 16a, for instance, Aristotle remarks that falsity and truth require combination and separation, whether of names and verbs in speech, or of elements in thought. However, it is unclear whether the resulting combination of thought elements is anything other than a token thought, as opposed to something which is the content of the token thought and which could be thought by others, could be denied, asserted, etc.