Assertions are strong statements which provide strong fact. Rhetoric theory is one which checks the available persuasions for the statement and the validates the claiming statement.
As given that non formal institutions have no role to play at processing stage of system theory, this statement has no valid supporting evidence.
The validity of this statement is questioned and therefore readers will have no evidence to accept this statement. The readers will think differently and assertion made is not accepted by the readers.
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The Battle of Salamis was one of the most significant battles in ancient Greece