pleonasm, perissology, pleonast, circumlocution, synathroesmus, polyptoton, agnomination, tautonym, sesquipedalianism, dormitive principle, more...

redundancy

redundancy, pleonasm, circular reasoning, tautological phrase, more...

mere, empty, pure, simple, apparent, meaningless, logical, sheer, trivial, obvious, useless

a vacuous truth,   logic truth,   obvious statement,   redundant insult,   true by definition,   redundant words,   redundant phrase,   violets are blue,   necessarily true