Computers provide invaluable aid for an increasingly high number of operations. However, this does not authorise human beings to decrease the amount and depth of knowledge that they need to acquire and apply: the extent and functionality of computer-provided aids depend on the extent and quality of the knowledge possessed by the humans using the computer. The present chapter analyses this requirement with regard to text-writing, considering aspects such as automatic spelling correction, computer’s suggestions for different wording, and the complexity associated with the use of plagiarism and self-plagiarism detecting software. It is concluded that good language mastery and adequate epistemological bases are fundamental for the humans (authors, editors, reviewers, students, and anybody who writes texts) to be in a position to maximise the benefits of the information provided by the computer and, simultaneously, to avoid errors or lowerings of the rigour and general quality of a scientific text. Since language mastery and epistemology familiarity are humanities-based abilities, it is thus concluded that optimal usage of the writing-related computer resources depends on the presence and adequacy of humanities-related expertise. This remains true also with regard to the recently developed AI-based text-generating chatbots.