Ask HN: What concepts have you never truly understood?
Inflation.<p>Everybody talks about how increasing the money supply means increased demand, which drives prices up. But nobody explains how does this *practically* happen. Prices don&#x27;t go up on their own, it&#x27;s the retailers who increase them at some point. So if the retailers&#x27; perception of the reality is not accurate (Suppose for example that money was printed &quot;secretly&quot;, or that the increase in demand wasn&#x27;t very apparent) prices won&#x27;t magically go up, no?<p>There is a common knowledge component in all those equations that&#x27;s missing and nobody talks about it. Maybe it&#x27;s too obvious that I&#x27;m overlooking it.