Synaisthesis is the specific moment at which the MADAD capacity activates; it stops being a theoretical faculty and becomes an event that actually happens. A person has experienced synaisthesis the moment they see, for the first time, the belief-mold they are living inside as a mold.
The most striking feature of this experience is its irreversibility: once a mold has been seen "as a mold," it can never again become as transparent, as invisible, as it was before.