@Reconstructo,
The triangle is a great representation of dialectic or synthesis. The circle is a great representation of logic or number.
Pure logic is pure number and pure number is only
one number, despite appearances. All number is a modification of 1. Don't be deceived by our ten-digit positional system. It's convenient, as we have ten digits. But
ten digits is
one quantity. (More on that later...)
Logos, however, is
not circular but triangular (or spiral, but that's another thread). For logos, or word, is not only the unification of qualia, but also of other words. Logos is an transcendentally synthetic, but
only because it relates us to the incidental, by unifying qualia. The first way that logos is triangularly describe is: one bottom angle is number, and the second bottom angle is qualia. At the top, we have the synthesis of qualia and name, or
concept. This is concrete concept, or
less-abstract concept.
Sometimes the "triangle" is used to synthesize not qualia but two or more concepts (so the triangle isn't a perfect analogy in this case.) But essentially, the synthesized concepts are the lower corners of the triangle and both are negated/synthesized in the new concept, the one represented by the peak of the triangle.
Philosophy is nothing but this synthesis, by which the transcendental is revealed/abstracted, including the synthetic process itself, which is both transcendental
and incidental. (symbolized quite well by Christ...)
The cross (+) expresses the same synthesis, but that's another thread....