Quantum error correction has taken a significant step forward with the application of time-reversal symmetry to quantum codes, imposing strict parity selection rules on physical error algebra. This breakthrough reveals that a time-reversal-invariant logical qubit on an odd number of spins must be a Kramers doublet, forcing all even-weight Pauli operators to act as scalars1. As a result, all even-weight Knill--Laflamme conditions are automatically satisfied, enabling single-qubit error detection to imply correction. This development has profound implications for the field of quantum computing, as it redefines the boundaries of error correction and opens up new avenues for research. The ability to detect and correct errors at the single-qubit level is crucial for the development of reliable quantum computing systems. So what matters to practitioners is that this innovation brings quantum computing one step closer to practical reality, with significant consequences for the future of computation and cryptography.