How many marks does Case naming make up? AQA A-Level Law

Im not certain ill remember like 90% of all of these by name, but i know the precedents. What impact would it take if i forget a case name and instead have to write "In a case the precedent is set" or something like that?

It will have some impact as it’s only partial knowledge, but even better than just saying “in a case” if you can remember what happens in the case and write down briefly what happened, my teacher told me they can still give you credit for that