post-scarcity/docs/System-private-functions.md

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# System private functions
**actually, I think this is a bad idea — or at least needs significantly more thought!**
System-private functions are functions private to the system, which no normal user is entitled to access; these functions normally have an [access control](Access-control.html) value of NIL.
# (sys-access-control arg)
System private. Takes one argument. Returns the access control list of its argument.
# (sys-readable arg user)
System private. Takes two arguments. Returns `TRUE` if the first argument is readable by the reader represented by the second argument; else `NIL`.