You will find a number of good answers at in these previously answered questions that are identical to yours.
http://www.jiskha.com/search/search.cgi?query=prejudicial+and+nonprejudicial+use+of+rhetorical+devices%3F+
How can a person distinguish between the prejudicial and nonprejudicial use of rhetorical devices?
3 answers
how can a person distinguish between
the prejudicial and nonprejudicial
use of rhetorical devices
the prejudicial and nonprejudicial
use of rhetorical devices
need a statement example of prejudicial and non prejudicial?