(By Jakob Lesage): "An antipassive marker detransitivizes verbs by removing the P argument or realizing it as an oblique argument. In a construction with ergative alignment, this means that the A argument of a transitive clause is encoded as the S argument in a corresponding antipassive clause. An antipassive marker often also has other detransitivizing functions, such as reflexivization, reciprocal, passive, or anticausative. In practice, this feature targets any intransitivising marker that is not, or not only, a reflexive, reciprocal, passive, or anticausative marker. This question targets productive phonologically bound antipassive markers on lexical verbs, as well as reduplication. Zero-marking or the removal of a transitivizing marker is not sufficient for a 1. Anything that happens with auxiliaries is irrelevant here. If the antipassive marker is only applied in a limited set of probably lexicalized items, it does not trigger 1.