These are not ”rules” but good sense criteria. Additional criteria for selecting examples will largely depend on the topic and nature of the essay.
An engineering or pure-scientific paper could make use of hypothetical cases, either well-known in the field or constructed specially by the author, to show the principle being discussed. Such examples should always be complete and coherent; as facile as it is possible without having to be trivial; requiring as little supporting material as you are able to to show the core principle, thus preventing distraction.
A topic that is practice-basedsuch as for example medicine, law, social work or business studies) should usually use real and referenced cases to illustrate a point. This usually requires way more extra information than will be appropriate for examples in other fields, but this will often be resigned to appendices.
Humanities, social sciences, languages, arts and other less prescriptive topics usually require a coverage that is broad of in order to substantiate a disagreement. For this reason, examples should always be as brief as you can (within reason) and from as wide a variety of sources that you can. Then examples should be selected from the full body of the work rather than a single verse, chapter, character or whatever if your examples must come from a single source (as with literary analysis. Needless to say, if you are able to provide material from beyond your ongoing operate in question to aid your point, it’s usually very well received.
Note that the point that is above multiple examples holds true when making a disagreement, nevertheless when making a counter-argument (ie disproving a previously proposed argument) it really is generally only necessary to provide an individual and conclusive counter-example, unless the counter-argument is the main theme of the work.
Bear in mind that it is considered poor practice in academic works to use archetypal examples to illustrate a point. In the event that you talk about examples which are already very well recognized to practitioners in the field, your paper will come across as lacking any depth of research and authority that is therefore lacking. […]