Before revision:  Specifically, we ask which priorities are such that the strategyproofness of deferred acceptance (DA) can be recognized by agents unable to perform contingency reasoning, that is, when is DA obviously strategyproof Li17  ? We answer this question by completely characterizing those priorities which make DA obviously strategyproof (OSP).
After revision:  Specifically, we ask which priorities are such that the strategyproofness of deferred acceptance (DA) can be recognized by agents unable to perform contingency reasoning, that is, Li17 ? We answer this question by completely characterizing those priorities which make DA obviously strategyproof (OSP).