Skills to acquire in 2020, ye Hacker News reader? A wee bit of abstract mathematics knowledge, so that you can better think in abstract terms when solving problems. The hardest of problems require the usage of and familiarity with advanced abstractions. Abstract mathematics knowledge provides that great—and profound!—capability.
Ah, a curious intellect has approached! Know that every “What kind?” is the desire for a common ground of understanding. So the student must first ask themself which understanding would they like to pursue. What be your choice? A choice that only your heart’s love can ultimately know.
> I think the op was asking because you had their interest and they wanted to know directions they could go in.
> Your post seems to assume people know of the different directions they could study
Ah, forgive me as I am blind to my appearance, especially blind to my appearance’s appearance to the sight or eyes of others. I too do not know what directions there may be in the pursuit of truth, as a master or sage must not claim to know. Only thus then does the master know true knowledge. ...For doth not truth be vast in size?—oh! but I do not know of truth’s size!
> Is this what they call gatekeeping in a different world?
Ah! Your name is greenly colored like the fresh and newly grass that dews in the start of the morning—as though your name appeared but hours ago! Ye be a strange traveller. I cautiously ask thee, It be true that I keep to the gates? But how can that be! when the gateway to true knowledge is open to all? Does some sort of strife exist? And my way be the way of non-action, a way of harmony. Whatever is, I allow. So you may be whatever you choose, you strange dear traveller! I welcome your force of argumentation.