  The question of identity conditions for propositions is importantly related to the question of whether propositions are structured entities. Propositions are structured if they have constituents, in some broad sense, and the order of the constituents matters. Order matters only if there could be two structured propositions sharing all the same constituents, but which are distinct due to differences in the way under which those constituents are “united” in the proposition. E.g., if the proposition that a loves b is the ordered triple &lt;loving, a, b&gt;, it is distinct from the proposition that b loves a, which would be the ordered triple &lt;loving, b, a&gt;.