When can we say that a bug is 100% fixed?

Hi Friends,
When can we say that a bug is 100 % fixed? Can any one answer this question.

Thanks in advance

Successful Retesting the defect will ensure you that the Bug is fixed and after doing successful regression for the related failed/on which Bug was raised in next passes/phase will enusre that the Bug is fixed

Regards

You can’t say bug is 100 % fix or 50 % fix . If Bug is fixed than in new version you have to do regression testing to make sure that Bug fix doesn’t have any impact on existing functionality / features.