This behaviour was well documented as of 21:50, 5 October 2013 https://community.bistudio.com/wiki/allDeadMen

Did you mean "including agents"? If so, then I expected that the command returns human agents, not all agents. There is allDead command for this. Isn't that logical?

No, agents are agents

agents apply {typeof agent _x} // ["Snake_random_F","Snake_random_F","Snake_random_F","Rabbit_F"]

>There is allDead command for this. Isn't that logical?
allDead includes vehicles allDeadMen excludes vehicles. I did not make it, so cannot tell you teh logic, but it was there for too long to change behaviour

It's still somehow strange -- despite the presence of the word "Men", I'll have to use additional filtering to exclude agents: allDeadMen select { _x getEntityInfo 0 }. The same I can do using allDead command: allDead select { _x getEntityInfo 0 }. It turns out that the only advantage of allDeadMen is the smaller size of the returned array.

I agree but as I said the behavious cannot be changed and as it is a Nular command alt syntax cannot be added. This means new command and for something trivial like this (all)Dedmen would not be happy

Understood, thanks.