But it detects two-bit errors. Which is nonzero, non-one, and non-infinity. -------- SEC without DED is the classic implementation of Hamming error correctio

But it detects two-bit errors. Which is nonzero, non-one, and non-infinity. -------- SEC without DED is the classic implementation of Hamming error correction codes. The double error detection (aka DED) but is grafted on top of the theory, because it's useful in practice.