Plain old error - prone, inaccurate, inefficient human beings, with all their loose circuitry and worn gaskets, had to be used after all.
Not exact matches
The damaged machinery, unforgiving environment, or
plain -
old «human
error» are much more likely to kill him first.
Now
plain old mean square
error (MSE) is a broadband measure --(Plancherel's theorem) which means that MSE regards equal amplitude features in proportion to their bandwidth.