“Simply” doesn’t necessarily mean “concisely” (outside of mathematical formalizations of Occam’s Razor). Conciseness is preferable when possible, but being too terse can start impacting comprehensibility. (Think of three programs that all do the same thing: a 1000-line C program, a 100-line Python program, and a 20-line Perl program. The length decreases with each one, but readability probably peaks with the Python program.)
The quote says “If you can’t explain it simply”, not “If you don’t explain it simply”. In this case, even if we do switch to “concisely” I think it checks out. Indeed, most of the major points Eliezer makes in the sequences could be stated much more briefly, but I get the sense that his goal in writing them is more than just transmitting his conclusions and his reasoning. No, it seems he’s writing with the goal of making his points not just intellectually comprehensible but obvious, intuitive, and second-nature. (Of course any intuition-pumpery, analogies, and anecdotes are used to complement good reasoning, not to replace it.) But I have little doubt that, if he really wanted to, he could he boil them down to their essential points, at the potential cost of much of the richness of his style of explanation.
(In any case, I’m not convinced that this quote is specific enough to serve as a usable norm. How simple? How much is “well enough”? Everyone will automatically assign their own preferred values to those variables, but then you’re just putting words in Einstein’s mouth, or rather, putting meanings in his words; you’re taking whatever rule you already follow and projecting it onto him. Fittingly, this is a case where a longer explanation would have been simpler (i.e. more understandable).)
Edit: I think I remember Eliezer once writing something like “Generally, half of all the words I write are superfluous. Unfortunately, each reader finds that it’s a different half.” That seems relevant as well. (Anyone remember the source of that?)
“Simply” doesn’t necessarily mean “concisely” (outside of mathematical formalizations of Occam’s Razor). Conciseness is preferable when possible, but being too terse can start impacting comprehensibility. (Think of three programs that all do the same thing: a 1000-line C program, a 100-line Python program, and a 20-line Perl program. The length decreases with each one, but readability probably peaks with the Python program.)
The quote says “If you can’t explain it simply”, not “If you don’t explain it simply”. In this case, even if we do switch to “concisely” I think it checks out. Indeed, most of the major points Eliezer makes in the sequences could be stated much more briefly, but I get the sense that his goal in writing them is more than just transmitting his conclusions and his reasoning. No, it seems he’s writing with the goal of making his points not just intellectually comprehensible but obvious, intuitive, and second-nature. (Of course any intuition-pumpery, analogies, and anecdotes are used to complement good reasoning, not to replace it.) But I have little doubt that, if he really wanted to, he could he boil them down to their essential points, at the potential cost of much of the richness of his style of explanation.
(In any case, I’m not convinced that this quote is specific enough to serve as a usable norm. How simple? How much is “well enough”? Everyone will automatically assign their own preferred values to those variables, but then you’re just putting words in Einstein’s mouth, or rather, putting meanings in his words; you’re taking whatever rule you already follow and projecting it onto him. Fittingly, this is a case where a longer explanation would have been simpler (i.e. more understandable).)
Edit: I think I remember Eliezer once writing something like “Generally, half of all the words I write are superfluous. Unfortunately, each reader finds that it’s a different half.” That seems relevant as well. (Anyone remember the source of that?)