* Prior knowledge: This is a general term that refers to any knowledge a reader brings to a text, regardless of whether they have encountered it before.
* Background knowledge: Similar to prior knowledge, but it often emphasizes the specific knowledge relevant to the topic at hand.
* Familiarity: This term emphasizes that the reader has encountered the material before, possibly in another context.
* Pre-existing knowledge: This term emphasizes that the knowledge was acquired before reading the current text.
* Informed reader: This term describes a reader who has some level of understanding of the subject matter before reading.
The best term to use will depend on the specific context and the nuance you want to convey.