✦Encoded in a state you can't get back to
Memory is cued by the state it was formed in. In the classic experiments, material learned in one physiological state is recalled best in that same state (Overton, 1964); divers who learn a word list underwater recall it better underwater than on land (Godden & Baddeley, 1975). This is state-dependent memory, and it predicts the DMT pattern exactly. The insight is encoded in a state ordinary waking consciousness cannot reach — so it is not merely forgotten, it is inaccessible from here. The tell is the return of the same content on re-dosing: recovery-on-re-entry is the signature of a retrieval-cue failure, not of erasure.
✦Not the same as ineffability
One honest distinction has to be drawn, because the two are constantly conflated. Ineffability is 'I remember it vividly but cannot put it into words' — a translation problem. Re-entry amnesia is 'I cannot retrieve it at all' — an access problem. They are different phenomena with different mechanisms, and this page is about the second. Chaining them together produces a tidy story and a wrong one; the Atlas keeps them apart.
✦The gift that turns to leaves
Folklore encoded the same asymmetry as narrative law. Fairy gold that becomes dead leaves or coal once carried across the threshold; the Sibyl's prophecies written on leaves and scattered by the wind; the dream-revelation gone on waking. The recurring rule is that value and knowledge are real inside their own world and do not survive the crossing back. It is the pre-scientific observation of exactly what state-dependent memory describes — the boundary, not the mind, is where the gift is lost.
✦What the sources say
State-dependent learning: material encoded in a state is best retrieved in that state.
Context-dependent memory (the divers study): retrieval is cued by the encoding context.
Fairy-gift-reversal motifs: value that turns worthless once carried across the threshold.
'It melts away like a dream' — the folk-observation of the return-trip amnesia.
Questions
Why can't I remember my DMT insights?
The likely mechanism is state-dependent memory: material encoded in the DMT state is cued by that state and is hard to retrieve from ordinary consciousness. That fits the reports better than simple forgetting — especially the way the same content returns on the next experience.
Why does the same realization come back each time?
Return-on-re-entry is the giveaway. If the memory were erased it would not come back; that it reappears when you re-enter the state points to a retrieval-cue effect — the state is the key that unlocks the content.
Is the message real, or is it nonsense?
The Atlas takes no position on the content's worth. The memory framing explains why it is hard to carry back; it does not rule on whether the insight was profound or noise. Both happen, and integration work is where people sort them out.