Plagiarism is essentially a form of academic dishonesty or cheating. At university level, such dishonesty is not tolerated and is dealt with severely, usually by awarding zero marks for a plagiarised essay or, in some cases, dismissing a student from the university.
When you submit your essay, you are implicitly stating that the essay is your own original and independent work, that you have not submitted the same work for assessment in another subject, and that where you have made use of other people's work, this is properly acknowledged. If you know that this is not in fact the case, you are being dishonest. (In a number of university departments, students are in fact required to sign declarations of academic honesty.)
Plagiarism is the knowing but unacknowledged use of work by someone else (including work by another student, and indeed oneself - see below) and which is being presented as one's own work. It can take a number of forms, including:
- copying: exactly reproducing another's words
- paraphrasing: expressing the meaning of another's words in different words
- summarising: reproducing the main points of another's argument
- cobbling: copying, paraphrasing or summarising the work of a number of different people and piecing them together to produce one body of text
- submitting one's own work when it has already been submitted for assessment in another subject
- collusion: presenting an essay as your own independent work when in fact it has been produced, in whole or part, in collusion with one or more other people
None of the practices of copying, paraphrasing, summarizing or cobbling is wrong in itself, but when one or more is done without proper acknowledgment it constitutes plagiarism. Therefore, all sources must be adequately and accurately acknowledged in footnotes or endnotes. (See Section 7.) Plagiarism from the internet in particular can be a temptation for a certain kind of student. However, be warned: there is a number of very good internet and software tools for identifying plagiarism.
With regard to collusion, it's undoubtedly often very helpful to discuss one's work with others, be it other students, family members, friends or teachers. Indeed, philosophy thrives on dialogue. However, don't kid yourself that you would simply be extending that process if you were to ask your interlocutor to join with you in the writing of your essay, whether by asking them to tell you what you should write or to write down some of their thoughts for you to reproduce in your essay. At the end of the day, you must be the one to decide what goes into your essay.
Students sometimes worry about whether they will be able to develop "original ideas", especially in light of the fact that nearly every philosophical idea one comes up with seems to have been thought of before by someone else. There is no denying that truly original work in philosophy is well rewarded, but your first aim should be to develop ideas that you think are good and not merely different. If, after arguing for what you believe is right, and arguing in way that you think is good, you then discover that someone else has had the same idea, don't throw your work away - you should feel vindicated to some extent that your thinking has been congruent with that of another (possibly great) philosopher. (If you have not yet handed your essay in when you make this discovery, make an appropriately placed note to that effect.) Don't be fooled, however, into thinking that plagiarism can be easily passed off as congruent thinking. Of course, if that other philosopher's ideas have helped you to develop your ideas, then this is not a matter of congruent ideas but rather of derivative ideas, and this must be adequately acknowledged. If, after developing your ideas, you discover that they are original, then that is an added bonus. But remember that it is more important to be a good philosopher than an original one.