On Mon, 27 Apr 2026 at 20:10, Diana Lee via Origami < [email protected]> wrote:
> I always call them "crease and collapse" models. > I would argue that you are creasing the paper and not pre-creasing. > > To me, a pre-crease would be like a notch fold (nick fold at the edge of a > paper), something that you do before you crease (and thus pre-crease) > Interesting point, Diana Lee. In reality, I believe that a folded sheet of paper, once opened again, is no longer folded, and the crease is gone. Therefore, it is made in advance (pre), only to be reversed and then repeated later in the same way. After the pre-crease, what remains is the trace of the crease, but not the c rease itself, because the sheet is flat again, thus not creased, and the crease is no longer in place. Instead, that crease, along its trace, will be redone later during the collapse, and this will be the final and effective execution, so that it remains creased. Therefore, to me, it seems correct to talk about a pre-crease, because you make a fold that you then undo, only to redo it later. Similarly, pre-order and pre-enrollment are both proper in my opinion, because they must be followed by confirmation/finalization of the order or e nrollment. Although unlike pre-crease they could not be reverted, they need to be confirmed. In other words, both the order and the enrollment are not finalized, and are not yet fully in place. Pre-pay is a different matter, as it is effectively a payment not meant to be reverted. It is just paid in advance, for some reasons, and it's effectively a payment. If the store goes bankrupt, money is gone. Exactly like the pre-boarding mentioned by Robert, which is effectively a boarding, not meant to be reverted and repeated (finalized) later. In theory, therefore, in all those cases where we fold and unfold, we should say "pre-crease." We don't do this, I think, intrinsically to avoid making the description of the steps cumbersome, but formally it would be correct, in my opinion. Because the crease will only be final at a later stage. Ciao, Lorenzo -- Lorenzo Lucioni Duesseldorf - Germany [email protected]
