1. A method of enabling input on a handheld electronic device that comprises an output apparatus, an input apparatus comprising a plurality of input members, and a processor apparatus, the method comprising: detecting an input member actuation editing a displayed text object that was generated as a result of an ambiguous text input; when the input member actuation reflects a deletion of a character from the displayed text object, outputting a first list comprising a number of disambiguated interpretations of the ambiguous text input excluding the deleted character, the first list being free of proposed completions; and responsive to detecting another input member actuation subsequent to detecting the input member actuation reflecting the deletion of the character, outputting a second list comprising a number of disambiguated interpretations based on the ambiguous text input excluding the deleted character, the second list including at least one proposed completion; and when the input member actuation reflects an addition to the displayed text object at a location disposed elsewhere than at a terminal end of the displayed text object, outputting a third list comprising a number of disambiquated interpretations of the ambiguous text input plus the input member actuation, the third list being free of proposed completions.