Exactly. Spaced repetition is a remarkably effective learning technique, but it can't tell you what to learn.

At some point I think we have to stop listening to external authorities and rely on our own judgement about what to learn, and how to do so, as signalled by feelings of excitement about particular authors and ideas. One of the effects of formal education is to dampen or corrupt that intuition, e.g. by instilling the desire to learn things 'properly' (say in a certain prearranged sequence) or by the desire to only learn prestigious topics in order to impress other people.

If we are engaged meaningfully with reality we will inevitably revisit particular subjects or authors multiple times. This is an organic form of spaced repetition. Forgetting certain things is part of that: we learn to swim during the winter and to skate during the summer.

It's a shame because the remaining 98% could get a lot of benefit and (setting aside the above) iodine is supposed to be the least toxic pure element. In the past Lugol's iodine was used as an antiseptic to put on cuts so I guess a fair amount got absorbed that way.

http://www.elitehomepage.org/manual.htm#A13

The manual was bundled with the cassette or disc, and it states in the 'Docking Procedure' section:

Approach the final moments of docking at DEAD SLOW SPEED

However this is dead wrong! If you put some speed on before entering the 'letterbox' you're actually far less likely to crash, unrealistic though this may be. It's perfectly possible to dock successfully at full speed. Try it out here:

https://www.bbcmicro.co.uk/game.php?id=366

Oddly enough, the docking computers are also capable of crashing your ship.

And they all liv'd together in a little crooked house.

(nursery rhyme)

e.g. when he turns into a centipede about 5 minutes into letter 22:

https://www.youtube.com/watch?v=dAJOstiPwiE&t=7474s