Why did they pick the name System One? It's not really explained what "System One tasks" and "System One shaped queries" are. Things that need a fast response?

Does this imply it's a very small model? I couldn't find anything about the model itself.

Maybe: https://thedecisionlab.com/reference-guide/philosophy/system...

Bingo. It's a Psychology term for the part of our brain that reacts instinctively rather than thoughtfully and logically