Moving to the sub-contrary terms, Not-Butterfly (∼S1) embodies No Day/Darkness, the hidden, pre-revelation state (like a pupa or a shadow), while Not-Moth (∼S2) signifies No Night/Brightness, representing pure, illuminated clarity.
When combining the primary terms, the Complex Term (S1 and S2) becomes Transition/Transformation, encompassing the complete life cycle where night meets day.
Finally, the Neutral Term (∼S1 and ∼S2) is Stasis/Unformed, representing the absence of life form and movement, like the inorganic material of silk.