Skimming reader
From my experience, one of the methods that we often encounter is the “skimming reader”, the student is in such a hurry to do the reading assignments so much that they often resort to reading the titles and highlights and then letting their own thoughts fill in the blank.
I hate to say it but google is to blame, seldom do we see students reading full books but rather the synopsis (see this article it is a bit dated but still holds true), https://www.theatlantic.com/magazine/archive/2008/07/is-google-making-us-stupid/306868/
Some students explain the concepts and you can see through their explanation the missing pieces, that help identify the root cause.
TweetExample for "Skimming reader":
https://bank.ecampusontario.ca/author/Mamdouh%20Mina