Well, IMO, it's more that you shouldn't even mention anything related to examples/texts/authors at all in the introduction - I would rather the introduction be a purely ideological/philosophical exploration and only that. The rationale for this is that IMO, the texts are only there to support your ideas, and are comparatively insignificant to the markers in terms of what is most important for marks; therefore the ideas themselves always come first, and they are what should get by far the most focus. Here is an example of the style I prefer from a 50-scoring student:
Prompt: People can never be sure that they share the same understanding of the truth
"In the sea of multiple perspectives in which we exist, an absolute grounding is something which becomes almost impossible to find. Truth is an inaccessible objective reality, and we can only ever get some sense of it. Moreover this sense does not necessarily complement the point of view of others, and it is dangerous to assume that everyone shares the same opinion. For depending on our character, history and emotions, we are affected in unique ways by different events, both at the time and in our future recollections as well. Our differing responses shape our understanding of an overall reality, and since no-one shares an identical journey through life, there are almost always slight disparities. This is especially likely when we deal with perceptions of ourselves, as human beings are prone to tampering with their personal sense of identity to place themselves in a more flattering light. The nature or extent of these differences in perception are not always clear, however, since disparate outlooks on the reality of the world often remain hidden unless specific events occur to draw out different interpretations. Something which appears to be understood in a single way on the surface may in fact have interpretations of the finer details which differ. This potential for a false sense of unity only adds to the uncertainty associated with the idea of a single truth. It also allows the possibility that we become too self-assured that everyone shares the same understanding of the truth, which can allow problems to arise. While the appearance of cracks in a cohesive surface reality can be devastating for some, for many others, a different perspective allows a greater understanding of the world. Thus when we become too sure that there are no other realities, we miss the opportunity to frame our understanding with that of others. There is no guarantee that everyone sees the truth as we do, and it is foolish to falsely assume that there is."
It's perhaps a little bit too long (I prefer intros in context ot be maybe 200-250 words), but you can see how there is absolutely nothing on anything apart from the ideas of the prompt.