[Nadge]

That sounds right. Anecdotally, some things I have memorised:

- Several phone numbers

- My National Insurance number (UK version of Social Security)

- 16 digit card number for 2 cards, as well as all the other numbers on the cards.

- 10 or so passwords (less important ones are randomly generated and handled by password managers.

So as you say, we may not be able to recite a 50-page poem, but one could argue that it's a lot easier to live in the modern world with many abstract strings memorised, in addition to all the knowledge that's considered crystallised intelligence.