Hello, Elle!
I had not heard of "Boolean", I'm afraid.
I had heard of algebra, though.
I get the message about switching off Adblocker sometimes.
Just takes a second for me to switch it off and then back on when I have finished.
Anyway, all the Walton family are billionaires.
Apparently the richest non-royal family in the world.
9d, I shall have to be a bit careful here!
All I know about Quentin Crisp is that he was a very effeminate man, and he was a writer, too.
So it could be said of him that the "writer's camp".
Do you understand that meaning?
Add in the Queen, "R" and you get "writer's cRamp" for the author's weakness.
Did John Hurt not play Crisp in a film?