 The analogy is that if a proposition (or a genealogy) is unknown, then one ascends to more general truths (the ancestor), but if the proposition (or the genealogy) is known, then one descends to the conclusion (the descendants). In other words, the analysis and the synthesis of an item is just the same demonstration, the only difference being the route or direction, i.e., whether one begins or ends with the proposition in question (Rogers &amp; Nelson 2015). This also makes clear the sense in which method is a matter of ordering knowledge. In analysis one puts the conclusion first in the order and proceeds to find the truths that it contains. Synthesis reverses this beginning with propositions that are already known and then understanding that the conclusion follows.