Earlier quoted context omitted.
You appear to be very rude to me; you asked: > And how is [DAI] pegged? Someone asked the various exchanges very nicely if they could only trade it for $1? This is a forum and people have given you pointers to answers and you are expected to do the work to study on your own. This happens a lot in life.
So far, I have a 20-minute video that is clearly mostly not about the Dai peg, and a link to a very wordy "paper". I skimmed both, and the answer is apparently "oracles", or a price feed from several crypto exchanges. That's a really simple answer, that doesn't need burying in layers of cryptobabble and an attitude that I can only describe as condescending.
But I find your commenting style abrasive; I wouldn't be surprised to see you flagged if you continue with it (especially with multiple examples in a single thread). Occasional outbursts seem to be tolerated here, although frowned upon as unconstructive. I myself personally tend towards abrasive confrontation of facts; but I really value the rules here since they create good discourse and avoid discord.