What I mean is: some boolean flags are perfect for the real world phenomenon they are representing e.g. is_light_on makes you understand perfectly that when it is true the light is on and when it is false the light is off.
There are other cases in which if you didn’t write the code and you don’t read any additional documentation, everything is not clear just by looking at the variable name e.g. is_person_standing, when true it’s clear what that means but when false, is the person sitting? Lying? Kneeling?
I’m obviously not talking about cases in which there are more states, boolean would of course not be a good solution in those cases. I’m talking about programs in which there are only two states but it’s not obvious, without external knowledge, which ones they are.
In your example, it’s implied that any pose other than standing is irrelevant in that context. Why do you need to care if you don’t need to care?
Maybe I explained myself poorly, what I was asking is about cases in which there are only two states e.g. standing and sitting and they are equally important so is_person_standing would not be a good name
If that sort of distinction is important, it’s best practice to eschew the boolean type and instead define an enumerated type in order to remove such ambiguity.