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Bidirectionality All oral communication needs at least one sender (or encoder) and one receiver (or decoder). Generally, in the process both interspersed roles taking turns to fill these positions. This differentiates it from other forms that are clearly unidirectional.
Fleeting character In oral communication, both sender and receiver need to occupy the same temporal position at the time of the communicative act.
Informal context Due to the transience of their character, in most cases, conversations cannot be verified as long as they leave no records. That is why they are associated with rather informal contexts. Therefore, among other implications, oral communication is not used very often in formal circumstances such as in legal settings.