Another month has passed and here is a new rationality quotes thread. The usual rules are:
- Please post all quotes separately, so that they can be upvoted or downvoted separately. (If they are strongly related, reply to your own comments. If strongly ordered, then go ahead and post them together.)
- Do not quote yourself.
- Do not quote from Less Wrong itself, HPMoR, Eliezer Yudkowsky, or Robin Hanson. If you'd like to revive an old quote from one of those sources, please do so here.
- No more than 5 quotes per person per monthly thread, please.
That's not what the quote expresses.
The quote basically says that there must be a dumbed-down version of describing whatever you are doing and you must know it -- otherwise you're clueless. And that just ain't true.
Specifically, it's not true in most hard sciences (an in math, too, of course).
Krugman, however, used to do research in economics where there is not much hard stuff and even that spectacularly doesn't work. Accordingly, there is nothing which is really complicated but does produce real results (as in, again, hard sciences). Given this, he thinks that really complicated things are just pointless and one must construct narratives -- because that's how economics, basically, exerts its influence. It makes up stories (about growth rates and money and productivity and... ) and if a story is too complicated it's no good.
That's fine for economics but a really bad path to take for disciplines which are actually grounded in reality.
OTOH it was Feynman who said something like ‘we don't know how to explain [something] to freshmen, therefore we don't really understand it yet’, and Einstein and Rutherford are alleged to have said similar things about explaining stuff to grandmothers and bartenders respectively.
He probably was using the word “understand” in a relatively narrow sense (after all he was the same person who said that no-one understood QM), and I agree with your general point, but certain people do overestimate how impossible it is to explain certain things in a way that can be understood by intelligent laymen (as done e.g. in Feynman's QED).