Pre-information

Pre-information (previous information) is information received prior to the occurring of an event, usually specifically related to the event akin to a Chekov's lecture.

Pre-information strongly differs from previously learned information that was intentionally learned. In a sense, this is where the individual stumbles across highly specific information that is then highly relevant to a future event of which they did not anticipate.

In Literacy
The closest variant to pre-information is within literacy known as 'fore-shadowing', in which an item, comment or piece of information precludes a particular event, often by talking about or suggesting it. Pre-information operates similarly, except the information required to solve the future problem is given in advance.

Related
This can overlap with fore-warning.