Tautology is the use of different words to say the same thing twice in the same statement.
- Let’s meet at 4pm in the afternoon.
(original/4pm – repetition/in the afternoon – 4pm is always in the afternoon)
Let’s meet at 4pm.
- This is a new innovation.
(original/new – repetition/innovation – innovation is always new)
- The reason is because he missed the bus.
(original/reason – repetition/because – reason and because have the same meaning)