Note 1: This exception relates to the underlying function, not the input technique. For example, if using handwriting to enter text, the input technique (handwriting) requires path-dependent input but the underlying function (text input) does not. Note 2: This does not forbid and should not discourage providing mouse input or other input methods in addition to keyboard operation. Understanding 2.1.1 Show Hide techniques and failures for 2.1.1 Sufficient Advisory Failures Sufficient Techniques for Success Criterion 2.1.1 Note: Other techniques may also be sufficient if they meet the success criterion. See Understanding Techniques.