In which Sly and Primo discover that medicine is an art, not a science, and I remember I am married to an engineer so there is no point in arguing about this (even though I want to)

Primo
He's cranky because he did not expect to take anywhere near this long to recover from the surgery.

Me
I mean his general personality

and why would he expect to recover quickly?

he is 81 years old!

and he is always cranky

Primo
One of the doctors admitted that the guideline of a 4-7 day stay in the hospital after surgery was always optimistic. They should have given us a realistic range.

Me
yes

Primo
They didn't do it right.

They should tell people what the bell curve looks like.

Something like "10% of patients are out of the hospital within X days, and 90% are out within Y days."

When they said 4-7 days, I interpreted that as something close to a minimum/maximum (i.e., roughly 10%/90%) range of expectations.

He was there for 16 days after surgery.