> If you want to be a walking encyclopedia, maybe SR is a good approach. But if you want to understand the world, be able to do things... SR can't help you. Ye

> If you want to be a walking encyclopedia, maybe SR is a good approach. But if you want to understand the world, be able to do things... SR can't help you. Yes, merely memorizing a lot of facts is not very useful. But unfortunately, burning a lookup table to your head is often a crucial step for actually using many types of knowledge, and it's a real headache for beginners. I find it's entirely possible to fully understand a result, yet unable to clearly remember it. When you need to use the result, having to pause and think (even for a few seconds), creates a significant cognitive overhead. Being able to recall some results mechanically is often advantageous. For example, a long time ago, it was lifechanging after I had discovered "man 7 units" and eventually remembered that 1 kilo = 1/(1 milli) = 1e3, 1 mega = 1/(1 micro) = 1e6, 1 giga = 1/(1 nano) = 1e9, 1 tera = 1/(1 pico) = 1e12, I was able to calculate much faster, and to say "The CPU is clocked at 1 GHz, which means it ticks every 1 nanosecond" without thinking. Previously, I fully understood what a SI prefix is, but I simply couldn't build a lookup table in my brain to map words to the number of zeros, and always needed to pause a moment to count. The man page allowed me to instantly check it while making calculation without leaving the commandline, effectively it was spaced repetition without software, and I finally remembered them... This is when spaced repetition is useful - burning some lookup tables to your brain. It cannot help you to understand things, but it has its place. Just be aware of its limitation.