psithurism /ˈsɪθjʊəˌɹɪzəm/
— I have never heard of the word.
– It means the sound of the wind rustling leaves in the trees.

– what about doppelgänger—"double walker"? I heard it's bad luck to meet them anyway.
– Can I just delete them if I see my coded twin?

– Look up, the rain came. It started with one drop, then two drops, then it connected into lines, and sheets.

But what if a line is not pointing to the past of a split second, a trace of movement, or anything else but themselves?