 “General”, or “universal”, does not describe here a specific item, but the way how one may expect someone will say or do things given the person she is. And that goes not only for tragedy, but also for comedy where (contrary to most tragedies which draw their plot from well known myths) particular names of the characters are up to the poet’s choice and added after the plot is written (1451b11–14): thus, here too, the crucial thing is to create a plausible plot where all the deeds and words done or uttered by the play’s characters seem to be causally related; this is what makes them plausible to an audience.