What do you call a person that has a lot knowledge/information but decides to not share it?
Is it really the classic know-it-all or enlightened?
What do you call a person that has a lot knowledge/information but decides to not share it?
Is it really the classic know-it-all or enlightened?
An obscurantist willfully withholds special knowledge from others.
There are two primary cultural connotations of this word, coming out of the European tradition. One is where the actor considers the knowledge too powerful or expensive for others, a form of elitism, expressed in both technical guilds and the Platonic philosopher king/tyrant who 'knows better'.
The other form is in making ones words hard to understand, either to hide emptiness or vagueness, a complaint against some philosophers (Hegel, Wittgenstein), or to hide simplicity behind technical language.
The phrases "information miser" and "miser of knowledge" have both seen some use.
A gatekeeper of information is someone who may have extensive knowledge and may choose not to share it, but it isn't a job requirement.
Maybe they're secretive or close-mouthed by nature.
Or perhaps they simply work for Apple.
A recluse comes to mind, especially with reference to a great mathematician Groetendick, who chose not to communicate with the world since so many years.
First, your title question is broken English. You do not “know” knowledge, you “have” knowledge (as you indeed correctly phrased it in the body of your post). You “know” THINGS. Knowing things is what constitutes HAVING knowledge.
Anywho, your title question reminds me of a recent other post in which the OP is asking about prejudicial questions:
Is there a name/term for phrasing something such that to disagree implicates yourself?
So, my point is that your question is of that nature, reeking of the presupposition that such withholding is improper. However, it may well be proper, from the concept of trade-secrets to the military concept of “need-to-know”. So, in other words, I do not agree that the term for such a person must necessarily be one having a “negative connotation”. As Flannery O’Connor once said (through one of her characters), you have to have certain things in order to understand certain things. Let’s see how YOU would behave if you somehow came upon a significant piece of information, say, a great stock pick. Information, to be useful, must often be kept secret and acted on in secret. Would you blab the stock tip, or would you just discreetly make the stock purchase?
Anyway, “closed-mouth” (to echo Gnawme, slightly edited) or “holding his cards close to his vest” perhaps are non-prejudicial adjectives describing this phenomenon.
(Again, a “closely-held” company is a common phenomenon. If you ask them how they became so successful, they will of course brush you off with some platitude like “by hard work and good management”.)