The number of "knowing, knowledge", and "learning" words is significant and there are many of them in English that come from Latin and Greek origins. If you go to this cogni-, cognosc- unit, you will be able to locate the many kinds of "knowing, learning" words that are used in our modern age; that is, if you utilize the links at the bottom of each page in this and the other word families.
Knowledge is of two kinds. We know a subjet ourselves, or we know where we can find information upon it.
Of all men's miseries, the bitterest is this; to know so much and to have control over nothing.
I find that a great part of the information I have was acquired by looking up something and finding something else on the way.
A specialist is someone who may know a great deal about one thing but very little about other things.