For the formation of new verbs, Persian very productively employs complex predicates, while the derivation of simple verbs has been held to be marginal or even inexistent. We use data from internet fora, blogs, and messaging services to argue that the derivation of simple verbs from nominals is a productive process at least among speakers of colloquial Persian who actively use online media. Two acceptability tests of seven verbs and two 'placebo verbs' conducted among 58 participants produced more than 7,000 gradings. They show that such verbs are surprisingly well accepted, with statistically significant differences depending on age, gender, region, TAM form, and the individual verbs. Some of these results seem quite straightforward (e.g., acceptance declining with age), others rather not (for instance, the present and past progressive is very well accepted). The results run counter to the assumption that a gradual substitution of synthetic structures (simple verbs) by analytical ones (complex predicates) is a unidirectional process. [ABSTRACT FROM AUTHOR]