Completely agree. This is the "formal training required" part that we miss while recounting these anecdotes. I still love the book, as in, It's giving you a sea to dip a little, look at pretty cool turtles, but one's gotta take a deep dive once in a while.

Thankfully I was never very good with numbers, so I only memorized it till the 6th digit so I could use it as my password!

(thankfully I can let my computer fix those for me :)

Better memory: "I used to think, hey I got sorta close to 10th digit, soon I'll know a lot more, yay!"

Ah, Edit: The deep dive should be with someone to pick you back out, in my experience.