Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
99.999%, 99.9995%, or even 99.9998%. One error in 100,000 operations. Six nines. Such as 99.9999%, 99.99995%, or even 99.99998%. One error in one million operations. Seven nines. Such as 99.99999%, 99.999995%, or even 99.999998%. One error in ten million operations. And so on. As many nines as you