I don’t know,
I was wrong,
I don’t understand. 
Discussion
🙏
Someone tried to tell me I was arrogant for knowing so much.
I said "I always considered the voluntary act of learning to be an admission of ignorance, making studiousness a virtue, so consider my collective knowledge at present to be the sum total of the number of instances in which I previously admitted my own ignorance and proceeded to rectify it. In other words, if I had a nickel of knowledge for every time I've said 'I don't know' in the past, I'd know THIS much."
They'd never considered knowledge as proof of work resulting from humble admissions of ignorance collected over the course of decades of opportunities.
Now let's look at the opposite:
"You don't know" is a sign of a bully. One may certainly ask for proof of some remark, or maybe change the statement to "we don't know". Pointing a finger is usually done by someone looking for a fight, to bring you down to the accuser's level of misery.
"You are wrong" is similarly an expression of hubris and anti-socialism. Providing proof to the contrary and letting the speaker divine his or her own conclusion is a way to allow the other to "save face" as the Chinese say.
"You don't understand" is the ultimate sign of a sociopath, especially when used after the first two expressions failed to produce the strife and misery intended. This is a sure sign to run - the person using this expression is simply a black hole of humanity trying to suck you into his or her bleak vortex.
Just my two sats...
