12. The method of claim 11 further comprising: receiving, at the computing device, a second user input comprising an indication selecting the visual indication associated with the incomplete factual proposition; in response to the second user input, outputting, for display, a menu that includes a completion element from the matched reference values and a cancel element, wherein the completion element is based on the missing portion of the incomplete factual proposition, and wherein the cancel element, when selected, rejects the completion element; receiving, at the computing device, a third user input comprising one of an indication selecting the completion element and an indication selecting the cancel element; and in response to the third user input, modifying the electronic document, resulting in a corrected version of the electronic document, by adding text related to the missing portion to the incomplete factual proposition if the third user input is an indication selecting the completion element and by removing the menu from the display without adding any text related to the missing portion of the incomplete factual proposition if the third user input is an indication selecting the cancel element.
12. The method of claim 11 further comprising: receiving, at the computing device, a second user input comprising an indication selecting the visual indication associated with the incomplete factual proposition; in response to the second user input, outputting, for display, a menu that includes a completion element from the matched reference values and a cancel element, wherein the completion element is based on the missing portion of the incomplete factual proposition, and wherein the cancel element, when selected, rejects the completion element; receiving, at the computing device, a third user input comprising one of an indication selecting the completion element and an indication selecting the cancel element; and in response to the third user input, modifying the electronic document, resulting in a corrected version of the electronic document, by adding text related to the missing portion to the incomplete factual proposition if the third user input is an indication selecting the completion element and by removing the menu from the display without adding any text related to the missing portion of the incomplete factual proposition if the third user input is an indication selecting the cancel element. 14. The method of claim 12 further comprising: saving the corrected version of the electronic document.