A person has a number called strength. The strength of a person is usually 14.
Definition: A person is alive if its strength is 1 or more. Definition: A person is killed[1] if its strength is 0 or less.
A person has a number called permanent strength.[2]
When play begins:
repeat with the patient running through people begin;
change the permanent strength of the patient to the strength of the patient;
end repeat.[3]
To restore the health of (patient - a person): change the strength of the patient to the permanent strength of the patient.
Understand "str" as a mistake ("STR is not a command, but a numerical measure of your current strength. It is constantly displayed in the status line bar at the top of the window, and you are (usually) notified of any changes.").[4]
Understand "diagnose" as a mistake ("You can check your STR at any time from the status line, the bar at the top of the window. It's currently [strength of the player].").[5]