[vegetablepotpie]

I think it’s where many functions return 0 when they are successful.

[leeoniya]

maybe cause there's only one way to succeed and many ways to error. 0 success and 1..N are error codes.

what is a reasonable alternative?

(this isnt the same as 0 false and 1 true)

[toomim]

Ok, but:

     success vs. fail

is different than:

     true vs. false

They're both binary, but only one is boolean.