At some stage a diligent student may become capable of self-correction.
This is a major step forward in terms of progress.
It does not mean that correction is unnecessary.
Rather, it indicates that the student has begun to take responsibility for the quality of their own practice.
They are now capable of determining to some extent what is correct.
Awareness, self-evaluation and the ability to see other possibilities is essential.
The ability to self-correct will speed-up the learning process.